Absolute configuration of N2-[10R-(7S,8R,9S-triacetoxy-7,8,9,10-tetrahydrobenzo[a]pyrenyl)]-O6-allyl-2′-dG [protected trans-(10R)-BaP DE dG adduct]. The labeling of the atoms in the molecule, the cocrystallized ethanol molecule, and the major torsional angles that define the conformation of the adduct, α′ = N1g-C2g-N2g-C10, β′ = C2g-N2g-C10-C9, and χ = O1d-C1d-N9g-C4g, are shown. The dashed lines indicate hydrogen bonds.