
TY  - JOUR
A1  - Bali, DKL 
A1  - Liokas, V 
A1  - Garson, MJ 
A1  - Faulkner, DJ 
T1  - Structural and Stereochemical Studies on Brominated Meroterpenoids From the Dictyoceratid Sponge <I>Cacospongia</I> sp.
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1990
VL  - 43
IS  - 12
SP  - 2009
EP  - 2020
KW  - 
UR  - https://doi.org/10.1071/CH9902009 
N2  - The structures of seven minor metabolites, (5)-(11), from the encrusting sponge Cacospongia sp. Were deduced by 1H, 13C and mass spectrometric data. Compounds (5)-(7) are hydroxy derivatives of the previously isolated tribromocacoxanthene (1); their relative stereochemistry was determined from 1H-1H coupling information. Compounds (8)-(11) represent an alternative cyclization mode of a cyclocymopol-related precursor (15) and possess a spiro-fused bicyclic ring system; the relative stereochemistry of (8)-(10) was deduced by 1H n.O.e. difference spectroscopy. The biological role of brominated meroterpenoids in Cacospongia sp. is discussed. 
ER  -

