Patent ID: 8329687

Claim:
A compound represented by the formula wherein A is −OR 1 or —S(O) p R 2 ; R 1 and R 2 are the same or different and each is (1) a hydrogen atom, (2) a C 1-10 alkyl group optionally having substituent(s), a C 2-6 alkenyl group optionally having substituent(s), a C 2-6 alkenyl group optionally having substituent(s), a C 7-12 aralkyl group optionally having substituent(s), a C 6-12 aryl group optionally having substituent(s), a C 3-6 cycloalkyl group optionally having substituent(s), or a C 3-6 cycloalkyl-C 1-10 alkyl group optionally having substituent(s), or (3) a 5- to 8-membered monocyclic nonaromatic heterocyclic group containing, besides carbon atoms, 1 to 4 heteroatom(s) selected from the group consisting of nitrogen atom(s), sulfur atom(s) and oxygen atom(s), optionally having substituent(s), a 5- to 8-membered monocyclic aromatic heterocyclic group containing, besides carbon atoms, 1 to 4 heteroatom(s) selected from the group consisting of nitrogen atom(s), sulfur atom(s) and oxygen atom(s), optionally having substituent(s), an 8- to 14-membered condensed nonaromatic heterocyclic group, wherein a ring corresponding to the above-mentioned 5- to 8-membered monocyclic nonaromatic heterocyclic group is condensed with a 5- or 6-membered aromatic heterocycle, a C 3-8 cycloalkane, or a C 6-12 arene, optionally having substituent(s), or an 8- to 14-membered condensed aromatic heterocyclic group, wherein a ring corresponding to the above-mentioned 5- to 8-membered monocyclic aromatic heterocyclic group is condensed with a 5- or 6-membered aromatic heterocycle, a C 3-8 cycloalkane, or a C 6-12 arene, optionally having substituent(s); and p is 0, 1 or 2, or a salt thereof.