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Abstract
methylene group. The 13 C NMR spectrum along with the DEPT and HMQC experiments revealed the presence of three methyls, five methylenes, five methines, and two quaternary carbon atoms. A detailed comparison of the above spectral data with those reported for (−)-torreyol revealed the structural resemblance of the two compounds, implying the skeleton of a cadinane sesquiterpenoid of 1. 16,17 Major differences were the disappearance of a methyl signal and the downfield-shifted signal of C-12 in the NMR spectra of 1 by compared to those of (−)-torreyol, indicating the presence of a hydroxyl group at C-12 in compound 1. The
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