| 摘要 |
5H-[1]Benzopyrano[3,4-d]pyridines represented by the formula <IMAGE> wherein each R1 is loweralkyl, R2 is alkyl, cycloalkyl or <IMAGE> wherein Y is a straight or branched chain alkylene group having from 1 to 10 carbon atoms and each R4, R5 and R6 are the same or different members of the group consisting of hydrogen, halo, trifluoromethyl or loweralkyl; and R3 is hydroxy, acyloxy, loweralkoxy, loweralkenyloxy, loweralkynyloxy or <IMAGE> X is a straight or branched chain alkylene group having from one to eight carbon atoms, and wherein R7 and R8 are the same or different members of the group consisting of hydrogen or loweralkyl, or <IMAGE> wherein X is a straight or branched chain alkylene group having from one to eight carbon atoms, a is an integer from 1 to 4, b is an integer from 1 to 4, Z is CH2, O, S or NR10 with R10 being hydrogen or loweralkyl, with the limitation that when Z is O or S, the sum of a and b is 3 or 4; and when Z is NR10, the sum of a and b is 3-5; R9 is hydrogen or loweralkyl, and the pharmaceutically acceptable salts thereof.
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