TY - JOUR
T1 - The structure of chalybaeizanic acid and quaesitic acid, two new lichen depsidones related to salazinic acid
AU - Elix, John A.
AU - Wardlaw, Judith H.
PY - 1999
Y1 - 1999
N2 - The depsidones chalybaeizanic acid (1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7H-isobenzofuro-[4,5-b][1,4] benzodioxepin-5,11-dicarbaldehyde) (4) and quaesitic acid (11-formyl-1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7H-isobenzofuro[4,5- b][1,4]benzodioxepin-5-methyl hydrogen fumarate) (5) have been isolated from the lichens Xanthoparmelia amphixanthoides and Hypotrachyna quaesita respectively, and their structures determined by a combination of spectroscopic evidence, partial synthesis, derivatization or degradation reactions.
AB - The depsidones chalybaeizanic acid (1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7H-isobenzofuro-[4,5-b][1,4] benzodioxepin-5,11-dicarbaldehyde) (4) and quaesitic acid (11-formyl-1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7H-isobenzofuro[4,5- b][1,4]benzodioxepin-5-methyl hydrogen fumarate) (5) have been isolated from the lichens Xanthoparmelia amphixanthoides and Hypotrachyna quaesita respectively, and their structures determined by a combination of spectroscopic evidence, partial synthesis, derivatization or degradation reactions.
UR - http://www.scopus.com/inward/record.url?scp=4143143091&partnerID=8YFLogxK
U2 - 10.1071/ch99056
DO - 10.1071/ch99056
M3 - Article
SN - 0004-9425
VL - 52
SP - x18-x19
JO - Australian Journal of Chemistry
JF - Australian Journal of Chemistry
IS - 7
ER -