... :6000kg/Month Product Description ESTRA-4,9-DIENE-3,17-DIONE 98% CAS No: 5173-46-6 as for ... norandrosta-4,9-diene-3,17-dione factory Quick Detail ESTRA-4,9-DIENE-3,17-DIONE 98% Product name: Estra- ... 4,9-diene-3,17-dione 98% Synonym: 19-norandrosta- ... 4,9-diene-3,17-dione; CAS Registry Number: ...