105539-27-3 25-((7-Chloro-4-nitrobenz-2-oxa-1,3-diazole)methylamino)-27-norcholesterol 25-Nbd-methylamino-27-norcholesterol 25-Nbd-mnc 27-Norcholest-5-en-3-ol, 25-(methyl(7-nitro-4-benzofurazanyl)amino)-, (3beta)-