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Ch c o h. Сн3-с=СН h3c Ch-ch2-ch3 ch3. H2c Ch c ch3 ch3 ch3. (-Ch2-c=c-ch2-)n полимер.
Сн3-с=СН h3c Ch-ch2-ch3 ch3. H2c Ch c ch3 ch3 ch3. (-Ch2-c=c-ch2-)n полимер.