Tamiflu , the most effective antiviral drug used to treat avian influenza, has the following structure. Identify the functional groups in Tamiflu . I = ester; II = aromatic; III = carboxylic acid I = ether; II= aromatic; III= anhydride I = ether; II = alkene; III = ether I = alcohol; II = alkyne; III = carboxylic acid I = ether; II = alkene; III = ester Aspartame, an artificial sweetener used in Equal and diet beverages, has the following structure. Identify the functional groups in Aspartame. I = aromatic; II = amine; III = carboxylic acid I = alkene; II = amide; III = alcohol I = aromatic; II = amine; III = ester I = alkene; II = amine; III = anhydride I = aromatic; II = amide; III = carboxylic acid