
TY  - JOUR
A1  - Chantrapromma, K 
A1  - Pakawatchai, C 
A1  - Skelton, BW 
A1  - White, AH 
A1  - Worapatamasri, S 
T1  - 5-Hydroxy-7-methoxy-2-phenyl-4H-1-benzopyran-4-one (Tectochrysin) and 2,5-Dihydroxy-7-methoxy-2-phenyl-2,3-dihydro-4H-1-benzopyran-4-one: Isolation From <I>Uvaria rufas</I> and X-Ray Structures
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1989
VL  - 42
IS  - 12
SP  - 2289
EP  - 2293
KW  - 
UR  - https://doi.org/10.1071/CH9892289 
N2  - 5-Hydroxy-7-methoxy-2-phenyl-4H-1-benzopyran-4-one ( tectochrysin ) (1), 5-hydroxy-7,8-di-methoxy-2-phenyl-4H-1-benzopyran-4-one (7-0-methylwogonin) (2), 5-hydroxy-6,7-dimethoxy-2-phenyl-4H-1-benzopyran-4-one (6,7-O,O-dimethylbacaiein) (3) and 2,5-dihydroxy-7-methoxy-2-phenyl-4H-1-benzopyran-4-one (4) have been isolated from the roots of Uvaria rufas Blume. The crystal structures of (1) and (4) have been determined by X-ray diffraction methods from diffractometer data at 295 K and refined by full matrix least squares. Crystals of (1) are monoclinic P21/c, a 10.l28(3), b 15.289(5), c 8.215(4) Å,&#946; 92.39(3)º Z 4; R 0.045 for No 874 'observed' reflections; crystals of (4) are monoclinic P21/c, a 12.299(4), b 6.489(3), c 16.579(6) Å, &#946; 90.24(3)º Z 4; R 0.051 for No 1016. 
ER  -

