The ethyl acetate extract of the leaves of Rhodomyrtus tomentosa (Ait.) Hassk. yielded rhodomyrtone (5) [6,8-dihydroxy- 2, 2,4, 4-tetramethyl-7-(3-methyl-1-oxobutyl)-9-(2-methylpropyl)-4,9-dihydro-1H-xanthene-1,3(2H)-dione] which had significant activity against Escherichia coli and Staphylococcus aureus. The structural elucidation followed from spectroscopic evidence and from a single-crystal X-ray structural determination.
Dachriyanus, N. V., Salni, N. V., Sargent, M. V., Skelton, B. W., Soediro, I., Sutisna, M., White, A., & Yulinah, E. (2002). Rhodomyrtone, an Antibiotic from Rhodomyrtus tomentosa. Australian Journal of Chemistry, 55(n/a), 229-232. https://doi.org/10.1071/CH01194