| 摘要 |
<p>A method for marking a petroleum hydrocarbon, biodiesel fuel or ethanol fuel by adding to the petroleum hydrocarbon, biodiesel fuel or ethanol fuel at least one compound having formula (I)
wherein R 1 and R 2 independently represent at least one substituent selected from the group consisting of hydrogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy and nitro; and R 3 and R 4 independently represent hydrogen, methyl or ethyl.</p> |
