| 摘要 |
Compounds of the formula (I):- …<CHEM>… and salts thereof, wherein R<1> is hydrogen, C1-6 alkyl, halo, cyano, nitro, amino, a group -NHCOR<4>, a group -COR<5>, or a group -NHC(NCN)NHR<6>; wherein R<4> is hydrogen C1-6 alkoxy, C1-6alkyl optionally substituted by phenyl, or R<4> is a group NR<7>R<8> wherein R<7> and R<8> are independently hydrogen, C1-6alkyl or benzyl; R<5> is hydroxy, hydrogen, C1-6alkyl, C1-6alkoxy, or a group -NR<7>R<8>; and R<6> is hydrogen or C1-6alkyl; R<2> is hydrogen or C1-4alkyl; R<3> is hydrogen or C1-4alkyl; and n is one, and when R<3> is hydrogen n can also be two. …<??>Processes and intermediates for their preparation are described. Pharmaceutical compositions containing them are described, as is their use as inotropic agents. |
