Using C[C@H]1CC2(CC3=CC[C@H]4[C@@H]5CC[C@H](O)[C@@]5(C)CC[C@@H]4[C@]31C)OCCO2 to produce C[C@H]1CC2(CC3=CC[C@@H]4[C@H](CC[C@]5(C)C(=O)CC[C@@H]45)[C@]31C)OCCO2, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.