<unk> s produced by fermentation are the chemical starting point for<unk>  Fermentation of Streptomyces avermitilis yields eight closely related<unk>  homologues, of which B1a and B1b form the bulk of the products isolated. In a separate chemical step, the mixture is hydrogenated to give<unk> , which is an approximately 80:20 mixture of the two 22,23-dihydroavermectin compounds.<unk>  is a macrocyclical lactone.
Ivermectin
Avermectin
Praziquantel
Mebendazole
Albendazole
Flubendazole
Pyrantel
Artemether