Tropane alkaloids are a group of naturally occurring alkaloids that contain a characteristic tropane ring system in their chemical structure. The tropane nucleus is a bicyclic nitrogen-containing ring with the formula
What are Purine Alkaloids? Purine alkaloids are nitrogen-containing natural products based on the purine/xanthine structural system . The most important naturally occurring members studied in pharmacognosy are the
Alkaloids are defined as a group of naturally occurring chemical compounds that mostly contain basic nitrogen atoms. The term "alkaloid" historically refers to substances with properties resembling alkalis. However, not
