COc1ccc2[nH]c3c(c2c1)CCN1C(=O)C(CC(=O)NCCCN(C)C)C[C@H](C(=O)N2CCOCC2)[C@@]31CCC1CCCC1
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?