| 摘要 |
Heterocyclic esters of benzopyrans represented by the formula <IMAGE> <IMAGE> wherein n is 1 or 2; each R and R1 are the same or different members of the group consisting of hydrogen or loweralkyl; R2 is loweralkyl; R3 is <IMAGE> WITH Y' being 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, X is CH2, O, S or NR7 with R7 being hydrogen or loweralkyl, with the limitation that when X is O, S, or NR7, a and b each must be 2; R8 is hydrogen or loweralkyl; Y is a straight or branched chain alkylene group having from one to ten carbon atoms; and each R4 and R5 and R6 are the same or different members of the group consisting of hydrogen, halo, trifluoromethyl or loweralkyl; and the pharmaceutically acceptable salts thereof. |
