Definition: Organic nitrogenous bases. Many alkaloids of medical importance occur in the animal and vegetable kingdoms, and some have been synthesized. (Grant & Hackh's Chemical Dictionary, 5th ed)
GEN or unspecified; prefer specific groups or specific alkaloid; alkaloids from specific plants go here (IM) + name of plant or PLANTS, MEDICINAL, etc.
himbacine [ NSC-23969,NSC23969 ] muscarine receptor antagonist; RN given refers to (3S-(3alpha,3aalpha,4beta(1E,2(2R*,6S*)),4abeta,8aalpha,9aalpha))-isomer; structure given in first source