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Novel cytotoxic constituents of Orthosiphon diffusus |
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| Authors: | Harish HollaYallamalla Srinivas Anjoy MajhiGannoju Srinivasulu Balasubramanian SridharArepalli Sai Krishna Janapala Venkateswara RaoBiswanath Das |
| Institution: | a Organic Chemistry Division-I, Indian Institute of Chemical Technology, Hyderabad 500 007, India b NMR Division, Indian Institute of Chemical Technology, Hyderabad 500 007, India c Department of X-ray Crystallography, Indian Institute of Chemical Technology, Hyderabad 500 007, India d Biology Division, Indian Institute of Chemical Technology, Hyderabad 500 007, India |
| Abstract: | Chemical investigation on Orthosiphon diffusus resulted in the isolation of four relatively rare, novel polychiral furanopyrans, orthodiffenes A-D (1-4) which were characterized from detailed studies of their 1D and 2D NMR spectra. The X-ray crystallographic analysis of orthodiffene A (1) was accomplished. The in vitro cytotoxic activity of orthodiffenes A-C (1-3) was tested against Jurkat and HL-60 cells using camptothecin as a positive control. Orthodiffenes A (1) and B (2) showed comparable activity to camptothecin against HL-60 and Jurkat cells, respectively. |
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