Using O=P([O-])(O)O, COc1ccc(COC(=O)n2c(SCc3ccc(C)cn3)nc3cscc32)cc1 to produce COc1ccc(COC(=O)n2c(S(=O)Cc3ccc(C)cn3)nc3cscc32)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.