Novel benzoheterocyclic compound of formula (I) and pharmaceutically acceptable salts thereof, which show excellent antivasopressin activity and oxytocin antagonistic activity, and are useful as a vasopressin antagonist or oxytocin antagonist. A is a 5- or 6-membered unsaturated heterocyclic residue having 1 to 2 heteroatoms. B1 and B2 are each methylene or a group of the formula: -NR8- (wherein R8 is a hydrogen atom or a lower alkyl group).

PCT No. PCT/JP87/00275 Sec. 371 Date Feb. 9, 1988 Sec. 102(e) Date Feb. 9, 1988 PCT Filed Apr. 30, 1987 PCT Pub. No. WO87/06582 PCT Pub. Date Nov. 5, 1987.This invention relates to a novel 5-fluorouracil derivative represented by the formula(1) wherein Ry is a hydrogen atom or a specific acyl group, Z is a phenyl-lower alkoxy-lower alkyl group, thienyl-lower alkyl group optionally substituted with halogen atom on the thienyl ring, or a groupwherein R1 and R2 are each a hydrogen atom, a specific ...

5-Fluorouracil derivatives of the formula in which RY is a hydrogen atom or a specific acyl group, Z is a phenyl-lower-alkoxy-lower-alkyl group, thienyl- lower-alkyl group which is optionally substituted by a halogen atom on the thienyl ring, or a group

This invention relates to a 5-fluorouracil derivative represented by the formula wherein R is a hydrogen atom or a specific acyl group, Z is a phenyl-lower alkoxy-lower alkyl group, thienyl-lower alkyl group optionally substituted with halogen atom on the thienyl ring, or a group wherein R<1> and R<2> are each a hydrogen atom, a specific acyl group, phenyl-lower alkyl group having a group ROCO- on the phenyl ring, or a group -(A)nB, R fix being a specific organic group, A ...