| abstract |
1. A compound represented by general formula (1) or a salt thereof [Formula 1] where G, G and G are the same or different and represent CH or a nitrogen atom; R represents a chlorine atom, a bromine atom, an iodine atom, an optionally substituted C 1-6 alkyl group, optionally substituted cycloalkyl group, optionally substituted aryl group, optionally substituted alkoxy group, optionally substituted aryloxy group, optionally substituted C1-6 alkylthio group, optionally substituted arylthio group, optionally substituted C1-6 alkylamine a group, an optionally substituted di (C1-6 alkyl) amino group or an optionally substituted heterocyclic group; R is —COOR (where R represents a hydrogen atom or a carboxyl protecting group) or —C (O) N (R) SOR (where R represents a hydrogen atom or an amino protecting group; and R 1 represents an optionally substituted C 1-6 alkyl group or an optionally substituted C 1-6 cycloalkyl group; R 1 represents a hydrogen atom or an imino protecting group; and R 1 is an optionally substituted fused bicyclic hydrocarbon ring group, an optionally substituted fused tricyclic hydrocarbon ring group, an optionally substituted bicyclic heterocyclic group, or an optionally substituted tricyclic heterocyclic group, provided that (1) if R is an optionally substituted fused hydrocarbon ring a nitrogen atom; and (2) if G is CH, G is CH, G is CH, R is a chlorine atom, a bromine atom, an iodine atom, |