Zard Samir

NEW SUBSTITUTED 16-METHYL STEROID DERIVATIVES OF PREGNA-1,4-DIENE-3,20-DIONE, THEIR PREPARATION, THEIR USE IN THE PREPARATION OF 16-METHYLENE STEROIDS AND NEW INTERMEDIATES

16-METHYL-(DELTA)1,4-PREGNADIENE-3,20-DIONES

(1-SUBSTITUTED) ALKYLPHOSPHONATES

NOVEL 16-(NITRO-SUBSTITUTED METHYL)PREGNA-1,4-DIEN-3,20-DION DERIVATIVES AND PROCESS FOR PRODUCING THEM

NEW 16-(SUBSTITUTED METHYL)-PREGNA-1,4,9(11)-TRIENE-3,20-DIONE DERIVATIVES AND PROCESS FOR PRODUCING THEM

NEW PROCESS FOR PRODUCING 16-METHYLENE STEROID DERIVATIVES

16-methylsubstituerede derivater af pregna-1,4-dien-3,20-dion, deres fremstilling, deres anvendelse til fremstilling af 16-methylensteroider og hidtil ukendte mellemprodukter

NUEVOS ESTEROIDES 16-METILO SUSTITUIDOS DERIVADOS DE LA PREGNA-1,4-DIENO-3,20-DIONA, SU PREPARACION, SU APLICACION A LA PREPARACION DE ESTEROIDES 16-METILENO Y NUEVOS PRODUCTOS INTERMEDIOS.

20-Isocyano-3-methoxy-pregna-3,5,17(20)-trien, Verfahren zu dessen Herstellung und dessen Verwendung zur Herstellung von 17alpha-Hydroxy-progesteron

NEW 16-(SUBSTITUTED METHYL)-PREGNA-1,4-DIENE-3,20-DIONE DERIVATIVES AND PROCESS FOR PRODUCING THEM