chapter  20
268 Pages

T

C23H20O6 392.407 Constit. of the leaves and stems of Tephrosia polystachyoides and in roots of Tephrosia purpurea. Cryst. (C6H6). Mp 226-2278 (224-2258). lmax 222 (log e 4.55); 269 (log e 4.56); 322 (log e 4.07) (MeOH). Smalberger, T.M. et al., J. S. Afr. Chem. Inst.,

1971, 24, 1-12 (Tephrosia polystachyoides constit, struct)

Antus, S. et al., JCS Perkin 1, 1977, 948-953 (synth)

Jain, A.C. et al., Curr. Sci., 1978, 47, 770 (biosynth)

Pelter, A. et al., JCS Perkin 1, 1981, 2491-2498 (Tephrosia purpurea constit)

T-2Taiwanhomoflavone B 6-[4-(5,7-Dihydroxy-6-C-methyl-4-oxo4H-1-benzopyran-2-yl)phenoxy]-2,3-dihydro-5-hydroxy-2-(4-hydroxyphenyl)-7methoxy-4H-1-benzopyran-4-one, CAS. 6-C-Methyl-2ƒ,3ƒ-dihydroisocryptomerin [509077-91-2]

C32H24O10 568.536 Constit. of the stems of Cephalotaxus wilsoniana. Cytotoxic against KB oral epidermoid carcinoma and Hepa 3B hepatoma cells. Pale yellow powder.