Chemical structure search

Input SMILES: O=C(CN1CCN(CCN(CCN(CC1)CC(=O)O)CC(=O)O)CC(=O)O)NCC1CCC(CC1)C(=O)N[C@H](C(=O)NCCCC[C@@H](C(=O)O)NC(=O)N[C@H](C(=O)O)CCC(=O)O)Cc1ccc2c(c1)cccc2

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To return all relevant hits please ensure that your input structure does not include chiral specification.