Caffeine (1,3,7–Trimethylxanthine, 1), R1 = R2 = R3 = Me;
Theobromine (3,7–Dimethylxanthine, 2), R1 = H, R2 = R3 = Me;
Theophylline (1,3–Dimethylxanthine, 3), R1 = R2 = Me, R3 =H;
Paraxanthine (1,7–Dimethylxanthine, 4), R1 = R3 = Me, R2 = H;
Heteroxanthine (7–Methylxanthine, 5), R1 = R2 = MH, R3 = Me;
Bosistophylline* (1,3–Di(3–methylbut–2-enyl)–7– methylxanthine, 6), R1 = R2 = prenyl, R3 = Me;
Theacrine (1,3,7,9–Tetramethyluric acid, 7), R1 = R2 = R3 = R4 = Me;
Liberine (2–Methoxy–1,9–dimethyluric acid, 8), R = H;
Methylliberine (2–Methoxy–1,7,9– trimethyluric acid, 9), R = Me
*In order to circumvent the long chemosystematic name, we introduce here the vernacular term Bosistophylline reminding of the name of the genus Bosistoa and therby as well as of the famous pharmaceutical chemist (Joseph Bosisto 1824–1898) to whom this genus was dedicated. More about this PuA and Bosistoa floydii, the plant containing it, later here.
chemical structures of the plants' PuA
The 'Caffeines'
The
Caffeine Plants
