2-[(4-Methoxyphenyl)methoxy]-1-propanol-D3 is an intermediate used in the synthesis of O6-(2-Hydroxypropyl)-2’-deoxyguanosine-d3 (H952617), which is a labelled O6-(2-Hydroxypropyl)-2’-deoxyguanosine, a mutagenic O6-alkylguanine adduct that induces mismatch repair-mediated toxicity.