prov:value
| - wherein R is hydrogen or methyl, R1 is hydrogen or --COX and X is --OM or ##STR2## wherein M is hydrogen or another single-valent cation, such as sodium, potassium, ammonium, lithium, and the like, wherein R' is hydrogen or lower alkyl, and wherein R is a lower alkyl, and wherein Y is sulfonate, (poly)hydroxy, (poly)carboxyl or carbonyl and combinations thereof.
|