| abstract |
compound, and, method for labeling a petroleum hydrocarbon or a biologically derived liquid fuel. a compound having the formula (ph3c) mar (gr) n, where ph represents a phenyl group, air is an aromatic ring system having six to twenty carbon atoms; g is o, s, so or so2; r is: (a) c1-c18 alkyl substituted by at least one of oh, sh, c1-c18 alkoxy and cyano; or (b) c4-c18 heteroalkyl; m is one or two; and n is an integer from one to four. |