| abstract |
A novel compound useful for cancer immunotherapy is provided. Equation (1): [Wherein, X represents a tyrosine residue or a methionine residue, Y and Z represent a single bond, R 1 represents a hydrogen atom, R 2 represents a hydroxyl group, etc., R 3 represents a hydrogen atom, alkyl R 4 represents a hydrogen atom, an alkyl group, a carboxy group or the like, m represents 1 or 2, and n represents an integer of 0 to 2. However, when n represents 0, R 3 represents a hydrogen atom or an alkyl group. Or a pharmaceutically acceptable salt thereof. [Selection figure] None |