
TY  - JOUR
A1  - Hambley, Trevor W. 
A1  - Taylor, Walter C. 
A1  - Toth, Stephen 
T1  - The Constituents of Marine Sponges. IX New Norditerpenoids from <emph type="2">Aplysilla pallida</emph>
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1997
VL  - 50
IS  - 9
SP  - 903
EP  - 910
KW  - 
UR  - https://doi.org/10.1071/C96169 
N2  - Four novel norditerpenoids were isolated from a new encrusting sponge, conveniently labelled Aplysilla pallida. The structures of aplypallidenone (1), aplypallidoxone (2), aplypallidione (3) and aplypallidioxone (4) were elucidated by spectroscopic studies and the crystal structures of aplypallidenone and aplypallidoxone have been determined by X-ray diffraction methods. The structure of (1) was refined to a residual of 0&#183;040 for 1665 independent observed reflections and the structure of (2) was refined to a residual of 0&#183;031 for 1699 independent observed reflections. The crystals of (1) are orthorhombic, space group P212121, a 7&#183;728(2), b 10&#183;838(4), c 24&#183;880(5) &#197;, Z 4. Those of (2) are monoclinic, space group C 2, a 23&#183;927(7), b 6&#183;674(2), c 14&#183;033(3) &#197;, Z 4. 
ER  -

