Abstract: It is an object of the present invention to identify a novel analog of carbacyclic phosphatidic acid that is a cyclic phosphatidic acid derivative, and to clarify the physiological activity thereof. According to the present invention, a compound represented by the following formula (1) is provided: wherein R represents a linear or branched alkyl group containing 1 to 30 carbon atoms, a linear or branched alkenyl group containing 2 to 30 carbon atoms, or a linear or branched alkynyl group containing 2 to 30 carbon atoms, and these groups may optionally comprise a cycloalkane ring or an aromatic ring; and M represents a hydrogen atom or a counter cation.

Abstract: Disclosed is a fluorescent film containing an azobenzene derivative represented by the general formula (I) below and a binder. (In the general formula (I), R1 represents a hydrogen atom or the like; Ar1 and Ar2 independently represent an optionally substituted arylene group or aromatic heterocyclic ring; X represents an alkylene group which may contain a heteroatom; X1 represents —NH— or the like; Y represents a hydrogen atom or the like; a represents an integer of 0-2; m and n independently represent an integer of 1-8, and when m and n are integers of not less than 2, a plurality of Ar1's and Ar2's may be the same as or different from each other.