17-Hydroxy-6alpha-methyl-4-pregnen-20-on 17-Hydroxy-6alpha-methylpregn-4-en-20-one 2740-52-5 Anagestona [INN-Spanish] Anagestone Anagestonum [INN-Latin] Pregn-4-en-20-one, 17-hydroxy-6alpha-methyl-