physostigmine alkaloid molecule. present in calabar bean and manchineel tree, acts as acetylcholinesterase inhibitor. 3d rendering

physostigmine physostigmin eserine esere calabar bean alkaloid cholinesterase inhibitor manchineel tree poison glaucoma gastric emptying antidote alzheimer intoxication physostigma venenosum hippomane manchioneel mancinella ordeal molecule atoms atomic model molecular compound composition chemical chemistry 3d rendering science scientific