Laudanosine or N-methyltetrahydropapaverine is a recognized metabolite of 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.

CAS：2688-77-9
中文别名：
英文别名：Isoquinoline, 1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-, (S)-;(1S)-1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-2-methyl-3,4-dihydro-1H-isoquinoline;
分子式：C21H27NO4
分子量：357.443
精确质量：357.194
Psa：40.16
Logp：3.4306

EINECS号：220-253-2

密度：1.111g/cm3
沸点：468.1ºC at 760mmHg
闪点：131.2ºC