An organic compound has the formula C8H9NO and the IR spectrum shown below. The index of hydrogen deficiency (IHD) for this compound is equal to Part 2 (1 point) On the basis of the IHD calculated in Part 1, which of the following structural features are possible in this compound? Choose one or more: aromaticring completely saturated hydrocarbon saturated ring double bond triple bond The intense peak at 1665cm1 indicates the possible presence of which of the following? Choose one or more: the C=O of an amide the C=O of an aliphatic ketone a nitrile the C=O of an aldehyde the C=O of a conjugated ketone Draw a structure for the compound that is consistent with the IR and IHD analyses. Assume that a monosubstituted ring is present