CPC C07K 16/18 (2013.01) [C07D 241/12 (2013.01); C07K 2317/92 (2013.01)] | 2 Claims |
1. A compound represented by formula (I) or (II):
wherein R1, R2, R3 and R4 are each independently selected from a hydrogen atom, a protecting group, and a peptide group having 1 to 1000 amino acid residues,
X1 and X2 represent —O— or —NH—;
Y1 and Y2 are a hydrogen atom, a protecting group, or a group:
R5 and R6 are each independently selected from a hydrogen atom, a protecting group, and a peptide group having 1 to 1000 amino acid residues;
or a cationic radical thereof, or a dication thereof or a salt thereof.
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