Polyaxibetaine, an amino acid derivative from the marine sponge Axinella polypoides.
A new pyridinium derivative, polyaxibetaine (3), has been isolated from the marine sponge Axinella polypoides, together with two known modified amino acids, 1 and 2. The planar structure of compound 3 has been elucidated by spectroscopic methods; definition of the absolute configuration of compounds 1-3 has been carried out through ECD studies.
Aiello
Anna
A
Dipartimento di Chimica delle Sostanze Naturali, Università degli Studi di Napoli Federico II, Via D. Montesano 49, 80131, Napoli, Italy.
Fattorusso
Ernesto
E
Luciano
Paolo
P
Menna
Marialuisa
M
Vitalone
Rocco
R
D000596:Amino Acids / Q000737:chemistry / Q000302:isolation & purification; D000818:Animals; D047089:Axinella / Q000737:chemistry*; D008386:Marine Biology; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D011726:Pyridinium Compounds / Q000737:chemistry / Q000302:isolation & purification*
D000596:Amino Acids; D011726:Pyridinium Compounds; C545047:axiphenylalaninium; C545048:axityrosinium; C549606:polyaxibetaine