(5alpha,17beta)-17-Benzoyl-4-azaandrost-1-en-3-one 134067-56-4 17beta-Benzoyl-4-aza-5alpha-androst-1-ene-3-one 4-Azaandrost-1-en-3-one, 17-benzoyl-, (5alpha,17beta)- MK 0434 MK 434 MK-0434