the presence of isopilocarpine , an epimer of pilocarpine , and of pilocarpinic acid , a hydrolytic degradation product of pilocarpine , was established and all three substances were assayed in various commercial ophthalmic formulations of pilocarpine hydrochloride by 13c-fourier transform spectroscopy .
C0031923
pilocarpine
C0770456
pilocarpine hydrochloride