| 摘要 |
COMPOUNDS OF THE FORMULA WHEREIN R1 SIGNIFIES ARYL OR HETEROCYCLYL; R2 SIGNIFIES TETRAZOLYL, LOWER-ALKYL-SUBSTITUTED TETRAZOLYL, CYANO, CARBOXY, LOWERALKOXYCARBONYL,HYDROXYMETHYL, FORMYL, CARBAMOYL, THIOCARBAMOYL, AMIDINO OR HYDROXYAMIDINO; R3 SIGNIFIES A RESIDUE -O-(CRARB)N-OR9; R4-R9 SIGNIFY HYDROGEN, LOWER-ALKOXY OR HALOGEN; R9 SIGNIFIES HYDROGEN, ARYL, LOWER-ARALKYL, HETEROCYCLYL OR A RESIDUE -C(O)NHR1O; R1O SIGNIFIES LOWER-ALKYL, PHENYL, SUBSTITUTED PHENYL, PYRIDYL OR SUBSTITUTED PYRIDYL; RA AND RB SIGNIFY HYDROGEN OR LOWER-ALKYL; N SIGNIFIES 2, 3 OR 4; AND A AND B SIGNIFY CH; OR ONE OF THE SYMBOLS A OR B SIGNIFIES NITROGEN AND THE OTHER SIGNIFIES CH: OR R2 SIGNIFIES HYDROGEN AND ONE OF THE SYMBOLS A OR B SIGNIFIES N-OXIDE (N_O) AND THE OTHER SIGNIFIES CH, AND PHARMACEUTICALLY USABLE SALTS OF COMPOUNDS OF FORMULA I.
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