| abstract |
Having an affinity against serotonine receptors, compound (I) shown below is useful as a therapeutic agent against various kinds of diseases of central nervous systems. n n n (wherein R 1 is hydrogen; R 2 is hydrogen or lower alkyl; R 3 is hydrogen, —COOR 12 and so on; R 4 is hydrogen, lower alkyl and so on, or R 3 and R 4 taken together may form ═O or ═S; R 5 is hydrogen, or R 3 and R 5 taken together may form a bond; R 6 is hydrogen, —COOR 24 and so on; R 7 is hydrogen, halogen, lower alkyl and so on; R 8 is hydrogen, lower alkyl, cycloalkyl and so on; R 9 , R 10 and R 11 are each independently hydrogen, halogen, lower alkyl and so on) |