| abstract |
Wherein n represents an integer of 1 to 8, Ar represents a benzene ring optionally having a substituent, or a naphthalene ring optionally having a substituent, each of R1 and R2 independently represents a hydrogen atom, a hydrocarbon group having 1 to 6 carbon atoms and optionally having a substituent, or an aromatic group optionally having a substituent, and R3 represents a hydroxyl group, a methoxy group, or a halogen atom. |