1.A steroidalkaloid derived from skin secretions of the Phyllobates and Dendrobates genera of South American arrow-poison frogs. It is one of the most potent venoms known.
2.The chemical constituents of grub ( Holotrichia diomphalia Bates. ) were systematically analyzed. The results showed that grab contained amino acids, polypeptide or protein, carbohydrate, alkaloid, organic acid, steroid et al.
