Cc1cc(C2(c3cc(C)c(NC(=O)CN4CCOCC4)c(C)c3)CCCCC2)cc(C)c1NC(=O)CN1CCOCC1
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?