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Isolation of the C(9) and C(10) isoprenoid carboxylic acids, the C(12) to C(18)alpha,omega-dicarboxylic acids, and the 2-methyl 1,n-dicarboxylic acids (n is 13, 15, and 16) from organic extract of the Colorado Green River shale (Eocene) is reported. Separation was achieved by column and gas-liquid chromatographic techniques and structural identification of individual components, by mass spectrometry.
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Haug et al. (1967) studied this question.
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