| abstract |
Provided is a chromene compound with little coloring in an unirradiated state. The following general formula (1) {Wherein, R 1 is an alkyl group, R 2 and R 3 are each independently a hydrogen atom, an alkyl group, or an alkoxy group, and R 4 and R 5 are each independently a hydrogen atom. R 6 and R 7 are each independently a hydroxyl group, R 8 and R 9 are each independently an aryl group, and Z is an alkylene group, a cycloalkylene group, It is a divalent group selected from an arylene group, a is an integer of 0-2, and b is an integer of 0-4. } The chromene compound shown by these. [Selection figure] None |