from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A benzyltetrahydroisoquinoline alkaloid that is a metabolite of atracurium and cisatracurium.
from The Century Dictionary and Cyclopedia
- n. A colorless, slightly bitter dextrorotatory alkaloid, O17H15N(OCH3)4, contained in opium. It crystallizes in needles melting at 89° C.
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