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C2h4 c2h5oh. Ch4 c2h2 c6h6 c6h5cl цепочка. C4h6. Цепочка c2h6 c2h5cl c2h5oh.
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C2h4 c2h5oh. Ch4 c2h2 c6h6 c6h5cl цепочка. C4h6. Цепочка c2h6 c2h5cl c2h5oh. 