Figure 3. A. Pristane/n-C₁₇H₃₆. B. Phytane/n-C₁₈H₃₈. C. Pristane/phytane. D. Hop 17-(21)-ene/hopane. E. Odd-even predominance (OEP 27, 2* n-C₂₇H₅₆/n-C₂₆H₅₄ + n-C₂₈H₅₈). F. 17ß, 21ß hopane/17, 21ß hopane vs. depth (mbsf).