| abstract |
Provided is a compound for marking a hydrocarbon, the compound having one of thenfollowing structures, or a tautomeric form of one of the following structures:n n nwherein R 1 is a substituent that does not comprise an aromatic unit; n is 0, or is an integer ofnfrom 1-5; D is the electron donor substituent; HP is the further hydrophobic substituent; p isnan integer of from 1-4; q is an integer of from 1-4; wherein p+q does not exceed 5; at leastnone D is an OH group; and at least one HP is a straight chain alkyl group; and provided thatnthe compound is not the following: |