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. 2017 Jun 5;7(2):28. doi: 10.3390/membranes7020028

Scheme 3.

Scheme 3

Preparation of tetrahydroxy-monomers 8a and 8b, and in the following polycondensation to PIM1-co-8a and PIM1-co-8b (55 °C in DMF/3–5 days).