(R)-2,2-Dimethyl-1,3-dioxolan-4-ylmethyl p-Toluenesulfonate is the unlabeled form of (R)-2,2-Dimethyl-1,3-dioxolan-4-ylmethyl-d2 p-Toluenesulfonate (D469556), which is an intermediate used in the synthesis of (S)-PA 824-d4 (P122502), a labelled novel anti-tuberculosis drug.