ecdysterone, 20e, chemical structure, molting hormones in insects

20e anthropod biochemistry black bodybuilding chemical chemistry component composition compound crustecdysone ecdysis ecdysteroid ecdysterone enhance formula gene geometric hormone hydroxyecdysone illustration insect isolated larva metamorphosis model molecular molecule molting moulting natural organic performance physical phytoecdysteroid research science shedding skeletal sloughing steroid structure substance therapy vector