Certepetide-13C6,15N2

O=C1[C@@]2([H])N(C(CN[13C]([13C@@H]([15NH]C([C@@H](NC(CNC([C@@H](NC([C@H](CSSC[C@H](NC([C@@H](N1)CC(O)=O)=O)C(N)=O)NC(C)=O)=O)CCCNC(N)=N)=O)=O)CC(O)=O)=O)[13CH2][13CH2][13CH2][13CH2][15NH2])=O)=O)CCC2

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