As nouns the difference between carboxyl and ergopeptine

is that carboxyl is (organic chemistry) a univalent functional group consisting of a carbonyl and a hydroxyl functional group (-cooh); characteristic of carboxylic acids while ergopeptine is (organic compound) a peptide ergot alkaloid; any ergoline derivative that contains a tripeptide moiety, comprising proline and α-hydroxy-α-amino acids, linked in a cyclol formation with the carboxyl carbon of proline.