C=CCN1C(=O)/C(=C\c2ccc(Oc3nc(N4CCOCC4)nc(N4CCOCC4)n3)c(OC)c2)SC1=S
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?