Harold Taylor

Plant antitumour agents: colubrinol acetate and colubrinol, antileukaemic ansa macrolides from Colubrina texensis

The isolation and structures of two new antileukaemic ansa macrolides, colubrinol acetate (1) and colubrinol (2), have been described.

Plant antitumour agents-XV: Isolation and x-ray crystal structure of a new antileukaemic quassinoid undulatone from Hannoa undulata

Abstract The structure of Undulatone, a new antileukaemic quassinoid from Hannoa undulata was determined by spectral means and confirmed by single crystal X-ray analysis of the methanol solvate.

Plant antitumour agents: isolation and structure of samaderine A (X-ray analysis) and a new antileukaemic quassinoid samaderine e from Samadera indica

Two quassinoids, samaderines A and E, have been isolated from Samadera indica; the structure of the former, a novel dienedione with a five-membered ring A, has been established by single-crystal X-ray analysis and that of the latter by spectral analysis.