Using CCc1cc2c(C3(CC)OCCO3)ccc(C=O)n2n1, C[Mg]Br to produce CCc1cc2c(C3(CC)OCCO3)ccc(C(C)O)n2n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.