CC(C)CCNC(=O)C1CCN(S(=O)(=O)c2ccc3nc4c(c(C(=O)O)c3c2)CCCCC4)CC1
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?