To provide a medicine invasive into eukaryotic cells and capable of thermally generating singlet oxygen in the cells especially at body temperature to kill or wound the cells.

This cell invasive type medicine capable of generating singlet oxygen at body temperature is characterized by comprising a compound represented by the general formula 1. In the general formulas A, B and C, at least one of R1, R2, R5 and R6, at least one of R9, R10, R13 and R14 and at least one of R15 to R18 are each COOR21 (wherein R21 is a lower alkyl).