Figure 1. Compounds identified herein by ¹H NMR in e-cigarette aerosols derived from a single puff from an electronic cigarette.

PG = propylene glycol; GLY = glycerol; 1a = propylene glycol hemiformal (major isomer); 1b = glycerol hemiformal (major isomer); 2 = glycidol; 3a = (Z)-prop-1-en-1-ol; 3b = (E)-prop-1-en-1-ol; 4 = dihydroxyacetone; 5 = acrolein; 6 = lactaldehyde; 7 = glycolaldehyde; 8 = glyceraldehyde; 9 = acetaldehyde; 10 = propanal; 11 = acetone; 12 = hydroxyacetone (acetol); 13 = acetic acid; 14 = formic acid; 15 = allyl alcohol.