FN Archimer Export Format PT J TI Marine Natural Occurring 2,5-Diketopiperazines: Isolation, Synthesis and Optical Properties BT AF LAVILLE, Remi MORIOU, Celine PETEK, Sylvain DEBITUS, Cecile AL-MOURABIT, Ali AS 1:1;2:1;3:1;4:2;5:2;6:1; FF 1:;2:;3:;4:;5:;6:; C1 CNRS, Inst Chim Subst Nat, Ctr Rech Gif Sur Yvette, F-91198 Gif Sur Yvette, France. Ctr Polynesie Francaise, IRD, UMR241, Papeete, France. C2 CNRS, FRANCE IRD, FRANCE UM EIO IF 1.107 TC 11 UR https://archimer.ifremer.fr/doc/00667/77944/82136.pdf LA English DT Article DE ;Diketopiperazine;Sponge;Marine Metabolite;Circular Dichroism AB Seven 2,5-diketopiperazines (DKPs) were isolated from the Fijian marine sponge Acanthella cavernosa. NMR and circular dichroism (CD) comparison with synthetic L-L DKPs allowed us to determine unambiguously the L-L absolute configuration of the natural DKPs. This work initiated the setting up of an optical properties database of natural DKPs, including specific rotation and CD. PY 2015 PD JAN SO Heterocycles SN 0385-5414 PU Pergamon-elsevier Science Ltd VL 90 IS 2 UT 000349505900048 BP 1351 EP 1366 DI 10.3987/COM-14-S(K)87 ID 77944 ER EF