prov:value
| - formula (I), R1 is hydrogen or methyl; R2 is hydrogen or a C1 -C4 alkyl such as methyl, ethyl, propyl, or butyl; R3 is hydrogen, a C1 -C4 alkyl, ##STR2## where Y is hydroxyl or halogen such as chlorine and bromine, ##STR3## and (CH2 CH2 O)n H where n is an integer 1 or more, preferably 1 through 20; and X- is an anion such as Cl-, Br-, CH3 OSO3 - and CH3 COO-.
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