摘要 |
<p>Compounds of formula I <CHEM> wherein R1 and R3, which are the same or different, are alkoxycarbonyl, acetyl, cyano, nitro, benzoyl or aminocarbonyl groups, R2 is differently substituted aryl or heteroaryl group; R4 is a C1-C12 alkyl group optionally substituted by amino, alkoxyl, amine, etc. groups; alkenyl, or alkinyl groups; optionally substituted aryl or heteroaryl groups. Compounds I are useful as antihypertensives in human therapy.</p> |