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Laudanosine
Names
Preferred IUPAC name
(1S )-1-[(3,4-Dimethoxyphenyl)methyl]-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinoline
Other names
N -Methyl-1,2,3,4-tetrahydropapaverine
Identifiers
ChemSpider
ECHA InfoCard 100.018.412
EC Number
UNII
InChI=1S/C21H27NO4/c1-22-9-8-15-12-20(25-4)21(26-5)13-16(15)17(22)10-14-6-7-18(23-2)19(11-14)24-3/h6-7,11-13,17H,8-10H2,1-5H3/t17-/m0/s1
N Key: KGPAYJZAMGEDIQ-KRWDZBQOSA-N
N InChI=1/C21H27NO4/c1-22-9-8-15-12-20(25-4)21(26-5)13-16(15)17(22)10-14-6-7-18(23-2)19(11-14)24-3/h6-7,11-13,17H,8-10H2,1-5H3/t17-/m0/s1
Key: KGPAYJZAMGEDIQ-KRWDZBQOBO
CN1CCc2cc(c(cc2[C@@H]1Cc3ccc(c(c3)OC)OC)OC)OC
Properties
C 21 H 27 N O 4
Molar mass
−1
Melting point
89 °C (192 °F; 362 K)
Except where otherwise noted, data are given for materials in their
standard state (at 25 °C [77 °F], 100 kPa).
Chemical compound
Laudanosine or N -methyltetrahydropapaverine[ 1] atracurium and cisatracurium . Laudanosine decreases the seizure threshold, and thus it can induce seizures if present at sufficient threshold concentrations; however such concentrations are unlikely to be produced consequent to chemodegradable metabolism of clinically administered doses of cisatracurium or atracurium .
Capsule of Papaver somniferum showing latex (opium) exuding from incision. Laudanosine occurs naturally in small amounts (0.1%) in opium. Laudanosine also occurs naturally in minute amounts (0.1%) in opium , from which it was first isolated in 1871.[ 2] dehydrogenation of laudanosine will lead to papaverine , the alkaloid found in the opium poppy plant (Papaver somniferum ).
Laudanosine is a benzyltetrahydroisoquinoline alkaloid . It has been shown to interact with GABA receptors , glycine receptors , opioid receptors , and nicotinic acetylcholine receptors ,[ 1] [ 3] [ 4] benzodiazepine or muscarinic receptors , which are also involved in epilepsy and other types of seizures.[ 5]
^ a b Fodale V, Santamaria LB (July 2002). "Laudanosine, an atracurium and cisatracurium metabolite". Eur J Anaesthesiol . 19 (7): 466–73. doi :10.1017/s0265021502000777 (inactive 1 November 2024). PMID 12113608 . {{cite journal }}: CS1 maint: DOI inactive as of November 2024 (link )^ Burger A (2005) [1954]. "The Benzylisoquinoline Alkaloids" . In Manske RH, Holmes HL (eds.). The Alkaloids: Chemistry and Physiology . Vol. 4. New York: Academic Press. p. 48. ISBN 0-12-469504-3 Google Book Search .^ Katz Y, Weizman A, Pick CG, Pasternak GW, Liu L, Fonia O, Gavish M (May 1994). "Interactions between laudanosine, GABA, and opioid subtype receptors: implication for laudanosine seizure activity". Brain Res . 646 (2): 235–241. doi :10.1016/0006-8993(94)90084-1 . PMID 8069669 . S2CID 35031924 . ^ Exley R, Iturriaga-Vásquez P, Lukas RJ, Sher E, Cassels BK, Bermudez I (Sep 2005). "Evaluation of benzyltetrahydroisoquinolines as ligands for neuronal nicotinic acetylcholine receptors" . Br J Pharmacol . 146 (1): 15–24. doi :10.1038/sj.bjp.0706307 . PMC 1576253 PMID 15980871 . ^ Katz Y, Gavish M (Jan 1989). "Laudanosine does not displace receptor-specific ligands from the benzodiazepinergic or muscarinic receptors". Anesthesiology . 70 (1): 109–111. doi :10.1097/00000542-198901000-00020 . PMID 2536252 .
Ionotropic
GABAA Tooltip γ-Aminobutyric acid A receptor
Positive modulators (abridged; see here for a full list): α-EMTBL Alcohols (e.g., drinking alcohol , 2M2B )Anabolic steroids Avermectins (e.g., ivermectin )Barbiturates (e.g., phenobarbital )Benzodiazepines (e.g., diazepam )Bromide compounds (e.g., potassium bromide )Carbamates (e.g., meprobamate )Carbamazepine Chloralose Chlormezanone Clomethiazole Dihydroergolines (e.g., ergoloid (dihydroergotoxine) )Etazepine Etifoxine Fenamates (e.g., mefenamic acid )Flavonoids (e.g., apigenin , hispidulin )Fluoxetine Flupirtine Imidazoles (e.g., etomidate )Kava constituents (e.g., kavain )Lanthanum Loreclezole Monastrol Neuroactive steroids (e.g., allopregnanolone , cholesterol , THDOC )Niacin Niacinamide Nonbenzodiazepines (e.g., β-carbolines (e.g., abecarnil ), cyclopyrrolones (e.g., zopiclone ), imidazopyridines (e.g., zolpidem ), pyrazolopyrimidines (e.g., zaleplon ))Norfluoxetine Petrichloral Phenols (e.g., propofol )Phenytoin Piperidinediones (e.g., glutethimide )Propanidid Pyrazolopyridines (e.g., etazolate )Quinazolinones (e.g., methaqualone )Retigabine (ezogabine) ROD-188 Skullcap constituents (e.g., baicalin )Stiripentol Sulfonylalkanes (e.g., sulfonmethane (sulfonal) )Topiramate Valerian constituents (e.g., valerenic acid )Volatiles /gases (e.g., chloral hydrate , chloroform , diethyl ether , paraldehyde , sevoflurane )Negative modulators: 1,3M1B 3M2B 11-Ketoprogesterone 17-Phenylandrostenol α3IA α5IA (LS-193,268) β-CCB β-CCE β-CCM β-CCP β-EMGBL Anabolic steroids Amiloride Anisatin β-Lactams (e.g., penicillins , cephalosporins , carbapenems )Basmisanil Bemegride Bicyclic phosphates (TBPS , TBPO , IPTBO )BIDN Bilobalide Bupropion CHEB Chlorophenylsilatrane Cicutoxin Cloflubicyne Cyclothiazide DHEA DHEA-S Dieldrin (+)-DMBB DMCM DMPC EBOB Etbicyphat FG-7142 (ZK-31906) Fiproles (e.g., fipronil )Flavonoids (e.g., amentoflavone , oroxylin A )Flumazenil Fluoroquinolones (e.g., ciprofloxacin )Flurothyl Furosemide Golexanolone Iomazenil (123 I) IPTBO Isopregnanolone (sepranolone) L-655,708 Laudanosine Lindane MaxiPost Morphine Morphine-3-glucuronide MRK-016 Naloxone Naltrexone Nicardipine Nonsteroidal antiandrogens (e.g., apalutamide , bicalutamide , enzalutamide , flutamide , nilutamide )Oenanthotoxin Pentylenetetrazol (pentetrazol) Phenylsilatrane Picrotoxin (i.e., picrotin , picrotoxinin and dihydropicrotoxinin )Pregnenolone sulfate Propybicyphat PWZ-029 Radequinil Ro 15-4513 Ro 19-4603 RO4882224 RO4938581 Sarmazenil SCS Suritozole TB-21007 TBOB TBPS TCS-1105 Terbequinil TETS Thujone U-93631 Zinc ZK-93426 GABAA -ρ Tooltip γ-Aminobutyric acid A-rho receptor
Metabotropic
GABAB Tooltip γ-Aminobutyric acid B receptor
Receptor (ligands )
GlyR Tooltip Glycine receptor
Positive modulators: Alcohols (e.g., brometone , chlorobutanol (chloretone) , ethanol (alcohol) , tert -butanol (2M2P)tribromoethanol , trichloroethanol , trifluoroethanol )Alkylbenzene sulfonate Anandamide Barbiturates (e.g., pentobarbital , sodium thiopental )Chlormethiazole D12-116 Dihydropyridines (e.g., nicardipine )Etomidate Ginseng constituents (e.g., ginsenosides (e.g., ginsenoside-Rf ))Glutamic acid (glutamate) Ivermectin Ketamine Neuroactive steroids (e.g., alfaxolone , pregnenolone (eltanolone) , pregnenolone acetate , minaxolone , ORG-20599 )Nitrous oxide Penicillin G Propofol Tamoxifen Tetrahydrocannabinol Triclofos Tropeines (e.g., atropine , bemesetron , cocaine , LY-278584 , tropisetron , zatosetron )Volatiles /gases (e.g., chloral hydrate , chloroform , desflurane , diethyl ether (ether) , enflurane , halothane , isoflurane , methoxyflurane , sevoflurane , toluene , trichloroethane (methyl chloroform) , trichloroethylene )Xenon Zinc Antagonists: 2-Aminostrychnine 2-Nitrostrychnine 4-Phenyl-4-formyl-N-methylpiperidine αEMBTL Bicuculline Brucine Cacotheline Caffeine Colchicine Colubrine Cyanotriphenylborate Dendrobine Diaboline Endocannabinoids (e.g., 2-AG , anandamide (AEA) )Gaboxadol (THIP) Gelsemine iso-THAZ Isobutyric acid Isonipecotic acid Isostrychnine Laudanosine N-Methylbicuculline N-Methylstrychnine N,N-Dimethylmuscimol Nipecotic acid Pitrazepin Pseudostrychnine Quinolines (e.g., 4-hydroxyquinoline , 4-hydroxyquinoline-3-carboxylic acid , 5,7-CIQA , 7-CIQ , 7-TFQ , 7-TFQA )RU-5135 Sinomenine Strychnine Thiocolchicoside Tutin Negative modulators: Amiloride Benzodiazepines (e.g., bromazepam , clonazepam , diazepam , flunitrazepam , flurazepam )Corymine Cyanotriphenylborate Daidzein Dihydropyridines (e.g., nicardipine , nifedipine , nitrendipine )Furosemide Genistein Ginkgo constituents (e.g., bilobalide , ginkgolides (e.g., ginkgolide A , ginkgolide B , ginkgolide C , ginkgolide J , ginkgolide M ))Imipramine NBQX Neuroactive steroids (e.g., 3α-androsterone sulfate , 3β-androsterone sulfate , deoxycorticosterone , DHEA sulfate , pregnenolone sulfate , progesterone )Opioids (e.g., codeine , dextromethorphan , dextrorphan , levomethadone , levorphanol , morphine , oripavine , pethidine , thebaine )Picrotoxin (i.e., picrotin and picrotoxinin )PMBA Riluzole Tropeines (e.g., bemesetron , LY-278584 , tropisetron , zatosetron )Verapamil Zinc NMDAR Tooltip N-Methyl-D-aspartate receptor
Transporter (blockers )
GlyT1 Tooltip Glycine transporter 1 GlyT2 Tooltip Glycine transporter 2
nAChRs Tooltip Nicotinic acetylcholine receptors
Agonists PAMs Tooltip positive allosteric modulators )
5-HIAA 6-Chloronicotine A-84,543 A-366,833 A-582,941 A-867,744 ABT-202 ABT-418 ABT-560 ABT-894 Acetylcholine Altinicline Anabasine Anatabine Anatoxin-a AR-R17779 Bephenium hydroxynaphthoate Butinoline Butyrylcholine Carbachol Choline Cotinine Cytisine Decamethonium Desformylflustrabromine Dianicline Dimethylphenylpiperazinium Epibatidine Epiboxidine Ethanol (alcohol) Ethoxysebacylcholine EVP-4473 EVP-6124 Galantamine GTS-21 Ispronicline Ivermectin JNJ-39393406 Levamisole Lobeline MEM-63,908 (RG-3487) Morantel Nicotine (tobacco )NS-1738 PHA-543,613 PHA-709,829 PNU-120,596 PNU-282,987 Pozanicline Pyrantel Rivanicline RJR-2429 Sazetidine A SB-206553 Sebacylcholine SIB-1508Y SIB-1553A SSR-180,711 Suberyldicholine Suxamethonium (succinylcholine) Suxethonium (succinyldicholine) TC-1698 TC-1734 TC-1827 TC-2216 TC-5214 TC-5619 TC-6683 Tebanicline Tribendimidine Tropisetron UB-165 Varenicline WAY-317,538 XY-4083 Antagonists NAMs Tooltip negative allosteric modulators )
Precursors (and prodrugs )
