| 摘要 |
A compound represented by the formula (I) or (II) or a salt thereof wherein R' represents hydrogen atom or a C1-6 alkyl group; R2 and R3 independently represent a hydrogen atom or a C1-6 alkyl group, or R2 and R1 may combine together to represent a 5- or 6-membered cycloalkyl group; R4 represents, for example, a hydrogen atom or a C1-6 alkyl group; R4 represents, for example, a hydrogen atom or a C1-6 alkyl group; R6 represents a hydrogen atom or a C1-6 alkyl group; X represents -NR7-, -O-, -CHR7- or -S- in which R7 represents, for example, a hydrogen atom or a C1-6 alkyl group; and Y represents a phenylene group or a pyridinediyl group. The compounds are useful as agents for enhancing the activities of retinoid compounds.
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