SMILES: CC1=CC=C(C=C1)S(=O)(=O)OCCC2CC(OC2=O)(C)C
Description: The molecule is a butan-4-olide having a 2-(tosyloxy)ethyl group at the 3-position and two methyl substituents at the 5-position. It is a butan-4-olide and a tosylate ester.