The invention relates to a compound represented by the following general formula (1) or its analogue, which selectively inhibit N-type calcium channels or its analogue, and to a method for treating pain etc. comprising the compound represented by the following general formula (1) or its analogue to a patient in need of such treatment: ##STR00001## wherein, A represents CH.dbd.CH, etc., a, b, c and d represents CH etc., R1, R2, R3, R4, R5 and R6 represents H etc., V--W represents C.dbd.C, etc., n represents 0 to 3, Y1 represents O etc., B represents --(CH2)vCHR21 wherein v is 0 to 3, R21 represents H, a lower alkyl group or the like, etc., G represents --CO--, a covalent bond, etc., m is 0 to 6, R7 and R8 represents H, a lower alkyl group, --COR18a, --COOR20 wherein R18a and R20 each represents a lower alkyl group or the like, etc.