Which of the following functional groups are present in: tiopronin (treatment for cyteinuria) alcohol amine/protonated amine carboxylic acid/carboxylate amide ester ketone aldehyde thiol Which of the following functional groups are present in: GlcNAc (component of insect exoskeletons) alcohol amine/protonated amine carboxylic acid/carboxylate amide ester ketone aldehyde Which of the following functional groups are present in: demerol (pain reliever) alcohol amine/protonated amine carboxylic acid/carboxylate amide ester ketone aldehyde thiol Which of the following functional groups are present in: cardizem (arrhythmia treatment) alcohol amine/protonated amine carboxylic acid/carboxylate amide ester ketone aldehyde thiol