CC(=O)Oc1cc2c[n+](C)c3c4cc(OC(C)=O)c(OC(C)=O)cc4ccc3c2cc1OC(C)=O.O=S(=O)([O-])F
In analogy to the rule of five, it has been proposed that ideal fragments should follow the rule of three, in which the molecular weight of a fragment is <300, the c LogP is ≤3, the number of hydrogen bond donors is ≤3 and the number of hydrogen bond acceptors is ≤3. The molecule meets rule of three or not?