Abstract: Succinic acid compounds of the formula: ##STR1## wherein A represents a heterocyclic group, a 3 to 8-membered cycloalkyl group or a phenyl group which may have one or more substituents selected from the group of a halogen atom, a lower alkyl group having 1 to 6 carbon atoms and a lower alkoxy group having 1 to 6 carbon atoms; B represents a bicyclic amino group which may have 1 or 2 unsaturated bonds, with the proviso that B bonds to the carbon atom of the carbonyl group at the nitrogen atom; R represents a hydrogen atom or combines each other to form a chemical bond; R.sup.

Abstract: The present invention provides a novel class of naphthylsulfonylalkanoic acid compounds such as a structure corrresponding to the formula: ##STR1## or a pharmaceutically acceptable salt thereof. A present invention naphthylsulfonylalkanoic acid compound is useful for prevention or treatment of irritable bowel syndrome, biliary dyskinesia and acute pancreatitis.

Abstract: The present invention provides a novel class of phenylsulfonylalkanoic acid compounds such as a structure corresponding to the formula: ##STR1## or a pharmaceutically acceptable salt thereof. A present invention phenylsulfonylalkanoic acid compound is useful for prevention or treatment of irritable bowel syndrome, biliary dyskinesia and acute pancreatitis.

Abstract: Benzofuro[3,2-c]quinoline compounds of the formula: ##STR1## wherein A represents a group of the formula of --CH.sub.2) .sub.m or --CH.sub.2 CH(OH)CH.sub.2 --; Y represents an N,N-di-alkylamino group, an N-mono-alkylamino group or a nitrogen atom-containing aliphatic geterocyclic group; n represents 0 or 1; m represents an integer of from 1 to 3, and pharmaceutically acceptable acid addition salts thereof, possess a strong inhibitory action on bone resorption, a stimulatory effect on ossification.

Abstract: Benzofuro[3,2-c]quinoline compounds of the general formula: ##STR1## wherein (1) each of R.sup.1 and R.sup.2 is the same, and represent a group of the formula of --OR.sup.3 in which R.sup.3 represents a carbamoyl group, an N-mono-alkylcarbamoyl group, an N,N-dialkylcarbamoyl group, an alkylsulfonyl group, a formyl group or an aliphatic acyl group which may have an alkoxycarbonyl group as a substituent; m represents zero, 1 or 2; n represents zero or 1; with the proviso that n is not zero when m is zero,(2) each of R.sup.1 and R.sup.2 is different, and represent a hydroxy group or an N,N-di-alkylcarbamoyloxy group; m represents 1 or 2; n represents 1, possess a strong inhibitory action on bone resorption and a stimulatory effect on ossification. Some benzofuro[3,2-c]quinoline compounds of the above general formula also possess a stimulatory effect on longitudinal bone growth, and thus are useful for the prevention or treatment of osteoporosis.