Photos СН4 2О2 2Н2О

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Сн4 2о2 2н2о. Н3с–с=СН 2 | СН 3. Сн3. Сн3-с=о-н. Сн3сн2с(о)н.
Н3с–с=СН 2 | СН 3. Сн3. Сн3-с=о-н. Сн3сн2с(о)н.

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