TY - JOUR ID - 2275 TI - Metabolic Transformation of the Brassinosteroid 24-Epi-castasterone by the Cockroach Periplaneta americana JO - Z. Naturforsch. C PY - 2000 SP - 233-239 AU - Schmidt, J. AU - Richter, K. AU - Voigt, B. AU - Adam, G. AU - VL - 55 UR - DO - 10.1515/znc-2000-3-415 AB - After feeding of 24-epi-castasterone to the cockroach Periplaneta americana an organspecific epimerization of the brassinosteroid to 2,24-depi-castasterone could be detected in female insects. The metabolite being observed only in the ovaries and not in the testes of the insect was identified by GC/MS in comparison with a synthesized authentic sample. Contrary, 24-epi-brassinolide is not metabolized in the sexual organs of Periplaneta americana. This is the first evidence of a metabolic transformation of a brassinosteroid in insects. A2 - C1 - Bioorganic Chemistry ER -