1-Ceto-24-methyl-calcifediol 1-Keto-24-methyl-25-hydroxycholecalciferol 1-Keto-24-methylcalcifediol 108387-51-5 9,10-Secoergosta-5,7,10(19)-trien-1-one, 3,25-dihydroxy-, (3beta,5Z,7E)- Carcinomedin