CCOC(=O)c1c(C)sc(-c2c(-c3cc(C)ccc3C)[nH]c3c2c(=O)[nH]c(=O)n3C)c1O
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?