A compound represented by general formula (I), which has an aromatase inhibitory activity and is useful for preventing and treating diseases caused by hyperestrogenosis, such as mastocarcinoma, metrocarcinoma and prostatomegaly. In formula (I) A represents C=O, CH₂, C=CH₂ or C=CH-lower alkyl; B represents O, NH or N-lower alkyl; X is nil, or represents C=O or CH₂; n is 2 or 3 when X is nil, or 1 or 2 when X represents C=O or CH₂; and the broken line between the 1-position and the 2-position in the steroidal skeleton means an optional presence of a double bond therebetween.
一种通式(I)代表的化合物,它具有芳香化酶抑制活性,可用于预防和治疗由
雌激素过多引起的疾病,如乳腺癌、间变性乳腺癌和前列腺肥大。在式(I)中,A 代表 C=O、CH₂、C=CH₂ 或 C=CH-低级烷基;B 代表 O、NH 或 N-低级烷基;X 为零,或代表 C=O 或 CH₂;当 X 为零时,n 为 2 或 3,当 X 代表 C=O 或 CH₂ 时,n 为 1 或 2;甾体骨架中 1 位和 2 位之间的断线表示其间任选存在双键。