`CH_(3) - OVERSET(NH_(3)) overset(|)(CH) = CH_(3)``CH_(3) - overset(NH_(3)) overset(|)(CH) = CH_(2)-NO_(2)` `CH_(3) - CH_(2) - CH_(2) - NO_(2)` `overset(NO_(2))overset(|)(CH_(2)) - overset(NO_(2))overset(|)(CH) -overset(NO_(2))overset(|)(CH_(2))`
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