prov:value
| - lene or propylene, R2 is hydrogen, R3 is hydrogen, methyl, or butyl, x is a number from zero to 80, y is a number from one to five, a is a number from 5 to 200, and b is a number from zero to 200; most preferably R is methyl, R1 is propylene, R2 is hydrogen, R3 is hydrogen, methyl, or butyl, x is a number from zero to 60, y is a number from one to five, a is a number such that the product of y tim
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