CCOC(=O)NC(=O)c1cn(CCN2CCN(C(=O)CCCCCCCCCCC(=O)N3CCN(CCn4cc(C(=O)NC(=O)OCC)c(=O)[nH]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?