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Showing papers by "Tom J. Mabry published in 1989"


Journal ArticleDOI
TL;DR: This article identified 13 flavonoid aglycones from aerial parts of Jasonia montana, including quercetagetin 3,5,6,7,3′-pentamethyl ether.

26 citations


Journal ArticleDOI
TL;DR: One flavanone, euchrestaflavanone A and four isoflavonoids (lupinalbin A-C, and a previously unreported 4′-methyl ether of wighteone) were isolated from Lotus creticus as mentioned in this paper.

21 citations


Journal ArticleDOI
TL;DR: In this paper, seven flavonoids are reported from an aqueous methanol extract of the flowers of Silybum marianum: apigenin 7-O -β-(2″- O -α-rhamnosyl)galacturonide, kaempferol 3-O-α-ρhamnoside-7- O-β-galacturide, apigenIN 7- O −β-glucuronide 6″-ethyl ester, a.k.a.

21 citations


Journal ArticleDOI
TL;DR: From aerial parts of Ophryosporus heptanthus, one known and three new entlabdane diterpenoids, four known tremetone and chromene derivatives and two known flavonoids were isolated.

18 citations


Journal ArticleDOI
TL;DR: The leaves and flower heads of Viguiera laciniata yielded lacinolide A, a new benzoic acid ester of heliangolide, and a new chlorinated heliangoline, lacinoline B, along with six other sesquiterpene lactones, four of which were new, one known diterpenes acid and two known flavanones as mentioned in this paper.

12 citations


Journal ArticleDOI
TL;DR: This compound belongs to a class of 3,2'-dioxygenated flavonoids whose ultraviolet (UV), mass spectroscopic (MS) and chromatographic properties indicate that in solution these compounds have reduced planarity (and thus reduced conjugation) of the B-ring chromophore with the A, C-ring Chromophore.
Abstract: C20H20O10, Mr = 420.37, triclinic, P1, a = 8.771 (3), b = 13.508 (3), c = 15.970 (4) A, alpha = 86.04 (2), beta = 81.77 (2), gamma = 84.17 (2) degrees, V = 1860.0 (8) A3, Z = 4 (two molecules per asymmetric unit), Dm (by flotation in ZnCl2/H2O solution at 298 K) = 1.491, Dx = 1.503 g cm-3, Mo K alpha radiation, lambda = 0.71069 A, mu = 1.14 cm-1, F(000) = 880, T = 163 K. Full-matrix least-squares refinement converged to R = 0.039 and wR = 0.037 using 5198 reflections with I greater than 3 sigma (I). The two molecules in the asymmetric unit differ in the torsion angles involving the methoxy groups and in the dihedral angle between the planes of rings B and C, 33.31 (7) and 40.83 (7) degrees in molecules (I) and (II), respectively. This compound belongs to a class of 3,2'-dioxygenated flavonoids whose ultraviolet (UV), mass spectroscopic (MS) and chromatographic properties indicate that in solution these compounds have reduced planarity (and thus reduced conjugation) of the B-ring chromophore with the A, C-ring chromophore.

5 citations