| 摘要 |
<p>Liquid petroleum products are marked with markers having the formula: <CHEM> where the Ws are selected from O-(C1-C3alkyl) and hydrogen, provided that at least one W is O-(C1-C3alkyl), the Xs and Ys are the same or different and are selected from hydrogen, alkyl, substituted alkyl, alkenyl, substituted alkenyl, aryl, substituted aryl, fused aryl, substituted fused aryl, halogen, nitro, cyano, and alkoxy.</p> |
