CCOC(=O)NC(=O)c1cn(-c2ccc(CCOC(=O)NCCCCCCNC(=O)OCCc3ccc(-n4c(=O)[nH]cc(C(=O)NC(=O)OCC)c4=O)cc3)cc2)c(=O)[nH]c1=O
Hydrogen bond acceptor: The atom, ion, or molecule component of a hydrogen bond which does not supply the bridging (shared) hydrogen atom. How many hydrogen bond acceptors does the molecule have?