N3-C4-NHS ester Catalog No.:M23840-C CC1C(C=C)=C2C=C3[N-]C(=CC4[N-]C(C=C5[N-]C(=CC=1[N-]2)C(C=C)=C5C)=C(C)C=4CCC(O)=O)C(CCC(O)=O)=C3C |c:6
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