| 摘要 |
Compounds of the general formula (I): <CHEM> wherein 1) R<1> and R<2> are the same as each other, and represent a group of the formula of -OR<3> in which R<3> represents a carbamoyl group, an N-mono-alkylcarbamoyl group, an N,N-dialkylcarbamoyl group, an alkylsulfonyl group, a formyl group or an aliphatic acyl group which may have an alkoxycarbonyl group as a substituent; m represents zero, 1 or 2; and n represents zero or 1; with the proviso that n is not zero when m is zero; or 2) R<1> and R<2> are different from each other, and represent a hydroxy group or an N,N-di-alkylcarbamoyloxy group; m represents 1 or 2; and n represents 1, which are useful for the prevention or treatment of osteoporosis. f |
