Oil of marjoram contains a pleasant, lemon-scented substance, C₁₀H₁₆ (compound G). Upon ozonolysis, G forms two products. One of them, H, has the formula C₈H₁₄O₂ and can be independently synthesized in the following way.

From this information, propose reasonable structures for compounds G through J.

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1. Mg. (CH,CH,),O 1. ВН. THF 2. Н.О.. NaOH 3. РСС, СH-C > H H3C 2. Н.С. СНCH РСС, СН,C C3H160 → C3H140 H;C CH,Br I J