Study on the hydroxyl protection of 11α, 17-dihydroxy- and 11β, 17-dihydroxy-androst-1,4-dien-3-on-17-nitrile
Chen Ying;Zhang Beina;Zheng Yunqing;Xia Peng
Chin. J. Org. Chem. . 2002, (5): 335 -340 .