| 摘要 |
<p>derivs. of formula (I) are new: where R is alkyl (opt. substd. by phenyl, substd. phenyl, halogen, 1-6C alkoxycarbonyl, carboxy, (1-6C alkoxycarbonyl) alkylthio, OH, SH, cycloalkyl or O-contg. heterocyclyl), alkenyl, cycloalkyl, aryl (opt. substd. by halogen, 1-6C alkyl, nitro, phenyl, substd. phenyl or phenoxy), or O or S-contg. heterocyclyl.</p> |
