(25R)-12a-aza-C-homo-5α-spirostano<12a,12-d>-tetrazol-3-one 生成 (NE)-N-[(1R,2S,4S,5'R,6R,7S,8R,9S,16S,17S,22S)-5',7,9,17-tetramethylspiro[5-oxa-10,11,12,13-tetrazahexacyclo[14.8.0.02,9.04,8.010,14.017,22]tetracosa-11,13-diene-6,2'-oxane]-20-ylidene]hydroxylamine