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In the saturate fractions of crude oils from the Zhu 1 and Zhu 2 depressions of the Pearl River Mouth Basin, two novel C15 sesquiterpanes have been detected except for drimanes and rearranged drimanes. By comparison with spectra and retention times in previous studies, they have been identified as 2,2,4α,7,8-pentamethyl-trans-decalin and 2,2,4α,7,8-pentamethyl-cis-decalin, respectively, which are...
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