CC(C)(C)c1cc2c(O)c(c1)COCc1cc(C(C)(C)C)cc(c1O)COCc1cc(C(C)(C)C)cc(c1O)COC2
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?