| 摘要 |
The present invention offers compounds or their salts expressed by formula (I) (in the formula, X indicates an alkyl group, or the like; Y indicates an alkyl group; Z indicates a respectively independent nitro group, or the like; n indicates any integer from 0 to 3; A indicates carbon atom, or the like, and hydrogen atom is bonded thereto in the case where the carbon atom is not substituted with Z; D indicates oxygen atom, or the like; W indicates hydrogen atom, or the like; R1 and R2 indicate respectively independent hydrogen atoms, or the like; R1 and R2 may be bonded, and may form a heterocycle together with the nitrogen atom between R1 and R2). (see formula I)
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