Nonsymmetrical beta-carboline dimers from an Ascidian, Didemnum sp.
In addition to the previously reported symmetrical beta-carboline dimer 1, an ascidian Didemnum sp. yielded trace amounts of beta-carboline and the nonsymmetrical beta-carboline dimers 2, 3, and 5. The structures of the nonsymmetrical dimers were confirmed by nonselective synthesis of 2 and 3 from beta-carboline, which also yielded additional dimers 4 and 6.
School of Chemical and Biomedical Science, Central Queensland University, Rockhampton Mail Centre, Queensland 4702, Australia.
Philip S
PS
Kearns
John A
JA
Rideout
D000818:Animals; D002243:Carbolines / Q000138:chemical synthesis / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D014561:Urochordata / Q000737:chemistry*
D002243:Carbolines