Abstract
Three new jatropholane-type diterpenoids, jatropholones C-E (1–3), along with seven other known compounds, including sikkimenoid B (4), jatrophaldehyde (5), epi-jatrophaldehyde (6), epi-jatrophol (7), jatrophol (8), jatropholone A (9), and jatropholone B (10), were isolated from the roots of a natural cultivar of Jatropha curcas (J. curcas cv. Multiflorum CY Yang). The structural elucidations of 1–3 were accomplished by extensive NMR analysis. Compounds 4, 6, and 8 demonstrated inhibition activity against the microorganisms with the MIC values from 0.10 to 0.18 mg/mL. 
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Keywords: Jatropha curcas cv. Multiflorum, Euphorbiaceae, diterpenes, antibacterial
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