FIELD: chemistry.SUBSTANCE: invention relates to a compound of formula (1) or a salt thereof, where D1 is a single bond, -N(R11)- or -O-, where R11 is a hydrogen atom or C1-C3 alkyl； A1 is C2-C4 alkylene, or any of divalent groups selected from the following formulae , and ,where n1 equals 0 or 1； n2 equals 2 or 3； n3 equals 1 or 2； R12 and R13 are each independently a hydrogen atom or C1 -C3 alkyl； v is a bond with D1； and w is a bond with D2； D2 is a single bond, C1-C3 alkylene, -C(O)-, S(O)2-, -C(O)-N(R15)-, or -E-C(O)-, where E is C1-C3 alkylene, and R15 is a hydrogen atom； R1 is a hydrogen atom, C1-C6 alkyl, a saturated heterocyclic group which can be substituted with C1-C6 alkyl groups, an aromatic hydrocarbon ring which can be substituted with C1-C3 alkyl groups, C1-C4 alkoxy groups, halogen atoms, cyano groups, a monocyclic aromatic heterocyclic ring containing one or two heteroatoms selected from a group consisting of a nitrogen atom, a sulphur atom and an oxygen atom, or the following formula ,where n1 equals 0, 1 or 2； m2 equals 1 or 2； D12 is a single bond, -C(O)- or -S(O)2-； R18 and R19 denote a hydrogen atom； R17 is a hydrogen atom or C1-C3 alkyl； and x is a bond with D2； under the condition that when R17 denotes a hydrogen atom, D12 denotes a single bond； under the condition that when D1 denotes a single bond, A1 denotes a divalent group of said formula (1a-5) or (1a-6)； when D1 denotes -N(R11)-, -O-, or -S(O)2-, A1 denotes a single bond, C2-C4 alkylene, or any of divalent groups selected from formulae (1a-1)-(1a-3), where, when A1 denotes a single bond, D2 denotes -E-C(O)-； and D3 is a single bond, -N(R21)-, -N(R21)-C(O) - or -S-, where R21 is a hydrogen atom； and R2 denotes a group of formula ,where Q denotes an aromatic hydrocarbon ring, a monocyclic aromatic heterocyclic ring containing one or two heteroatoms selected from a group consisting of a nitrogen atom, a sulphur atom and an oxygen atom, a condensed polycyclic aromatic ring containing one
