AI Article Synopsis
- Two new labdane diterpenes were discovered from Crassocephalum mannii: 8alpha,19-dihydroxylabd-13 E-en-15-oic acid (1) and 13,14,15,16-tetranorlabdane-8alpha,12,14-triol (2), as well as an acetylated derivative (3a).
- The structures of these compounds were determined through spectroscopic data analysis.
- Compounds 1 and 2, along with their acetylated derivatives (1a and 2a), exhibited selective inhibitory effects on cyclooxygenases COX-1 and COX-2.
Article Abstract
Two new labdane diterpenes, 8alpha,19-dihydroxylabd-13 E-en-15-oic acid (1) and 13,14,15,16-tetranorlabdane-8alpha,12,14-triol (2), as well as an acetylated derivative, 8alpha-O-beta-D-glucopyranosyllabd-13 E-ene-15,19-diol-8alpha-2',3',4',6'-hexaacetate (3a), were isolated from the aerial parts of Crassocephalum mannii. The structures of 1, 2, and 3a were elucidated by spectroscopic data analysis. Selective inhibitory activity for 1 and 2 and their acetate derivatives, 1a and 2a, against cyclooxygenases (COX-1 and COX-2) was detected.
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| http://dx.doi.org/10.1021/np800017x | DOI Listing |
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