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Ch3ch2oh x1 x2 x3 этин x4. Ch3ch2ch2oh x1 c6h14 x2. Ch2oh ch2oh x1 x2 naccna x3. Ch3ch2oh h2so4 180.
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Ch3ch2oh x1 x2 x3 этин x4. Ch3ch2ch2oh x1 c6h14 x2. Ch2oh ch2oh x1 x2 naccna x3. Ch3ch2oh h2so4 180. 