Endomorphin 2

=95%

C (N[C@@H] (CC1=CC=CC=C1) C (N[C@@H] (CC2=CC=CC=C2) C (N) =O) =O) (=O) [C@H]3N (C ([C@H] (CC4=CC=C (O) C=C4) N) =O) CCC3

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