摘要 |
<p>Novel title cpds. have formula: (where R1 = 1-3C alkyl, R2 = H, halo or 1-4C alkyl, R3 = H, methyl, R4, R5 = H, 1-6C alkyl or together with the N atom form a morpholino, piperazino, pyrrolidino or piperidino ring opt. substd by methyl and n = 1-3) their acid addition salts also being claimed.</p> |