A new xenicane norditerpene from the Indian marine gorgonianAcanthogorgia turgida

Abstract

Chemical investigation of the liposoluble extract of the gorgonian Acanthogorgia turgida, from Indian coasts, led us to isolate a new xenicane-based norditerpene, isoacalycixeniolide-A (1), along with the known structurally related compounds 2-6. The structure of the norditerpene (1) was elucidated by spectral methods (mainly by NMR techniques), whereas the absolute stereochemistry was suggested by the application of circular dicroism methodology.

Chemical and biological aspects of octocorals from the Brazilian coast

“…It also has been described a xenicane-based norditerpene, isoacalycixeniolide-A, from the gorgonian Acanthogorgia turgida, found in the coasts of India. Other xenicane norditerpenes from the genus were reported previously (Manzo et al, 2009). …”

Marine natural products

“…666 Investigation of the chemistry of the hybrid soft coral Sinularia maxima  S. polydactyla yielded five new terpenoids bearing a cembrane-africanane skeleton. 670 Absolute configuration was assigned (ORD), with the same absolute configuration also being ascribed to co-metabolites acalycigorgin E 671 and acalycixeniolides B 672 and G. 673,674 In addition to a number of known briaranes, the new example juncin ZII 841 was reported from Junceella juncea (Sanya, Hainan Province, China). 669 A new norditerpene bearing a xenicane skeleton, isoacalycixeniolide A 840, was isolated from Acanthogorgia turgida (Grandi Is., Goa, India).…”

Diterpenoids of Gorgonian Corals: Chemistry and Bioactivity

“…In 2009, an example was a new xenicane‐based norditerpenoid, isoacalycixeniolide A ( 224 ) , found in the gorgonian A. turgida (Grandi Island, Goa, India), whereas the absolute configuration was suggested by the application of circular dicroism methodology.…”