prov:value
| - and wherein R??? is O, N, SO2, methylene, S, N(R5), wherein R5 is alkyl or R6???O???R7, wherein R6 and R7 are the same or different and are each individually C1-C4 alkyl; wherein if R??? is O or SO2 then w=0 or 1, x=0-30, y=0-30, and z=0-30, wherein w+x+y+z>2, and if R??? is other than O or SO2, then w=0-2, x=0-30, y=0-30, and z=0-30, wherein w+x+y+z>2.
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