Humans article drug synthesis unclassified drug Sterols 2 Ugi reaction 2 chemical reaction 2 drug cytotoxicity 2 human 2 nonhuman 2 structure activity relation 2 (17beta) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxylate 1 (17beta) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxylic acid 1 (17beta) n ((t butylcarbamoyl)methyl) n (2 chlorophenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (2 ethyl 6 methylphenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (2 fluorophenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (2 naphthyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 chlorophenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 chlorophenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 fluorophenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 fluorophenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 methoxyphenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 methoxyphenyl) 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n (4 methylphenyl) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n phenyl 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxamide 1 (17beta) n ((t butylcarbamoyl)methyl) n phenyl 4,4 dimethyl 3 oxoandrost 5 ene 17 carboxamide 1 16 oxo dihydrocucurbitacin b 1 2 (t butylamino) 2 oxoethyl (17beta) 4,4 dimethyl 3 hydroxyandrost 5 ene 17 carboxylate 1 2 bromo dihydrocucurbitacin b 1 2 deoxy dihydrocucurbitacin b 1