cefprozil (6),antidiabetic agents like acarbose (7),and anticancer agents like epirubicin(8).25 OH HO HO. Cefprozil(6) HO OH OH OH Acarbose(☑ OMe O OH O Ho 7o Epirubicin(8) 1.5.4.Natural products from animal sources Animals also form a source of some interesting bioactive compounds.Epibatidine (9),a nitrogen containing heterocyclic compound isolated from the skin of an Ecuadorian poison frog,was found to be ten times more potent than morphine.26 Venoms and toxins from animals have played a significant role in designing a multitude of cures for several diseases.Teprotide,a toxic venom, extracted from a Brazilian viper,has led to the development of cilazapril (10)and captopril(11),which were found to be effective against hypertension.27 cefprozil (6), antidiabetic agents like acarbose (7), and anticancer agents like epirubicin (8).25 NH2 HO N H O N O S O OH H Cefprozil (6) HN HO OH OH OH O O OH HO HO HO OH OH OH OH Acarbose (7) O O OH OMe OH O OH O O HO H2N Epirubicin (8) HO 1.5.4. Natural products from animal sources: Animals also form a source of some interesting bioactive compounds. Epibatidine (9), a nitrogen containing heterocyclic compound isolated from the skin of an Ecuadorian poison frog, was found to be ten times more potent than morphine.26 Venoms and toxins from animals have played a significant role in designing a multitude of cures for several diseases. Teprotide, a toxic venom, extracted from a Brazilian viper, has led to the development of cilazapril (10) and captopril (11), which were found to be effective against hypertension.27