One example is the shark liver oil, which is approximately 14% pristane (2,6,10,14-tetramethylpentadecane, C19H40).
wˈʌn ɛɡzˈæmpəl ɪz ðə ʃˈɑːɹk lˈɪvɚɹ ˈɔɪl, wˌɪtʃ ɪz ɐpɹˈɑːksɪmətli fˈoːɹtiːn pɚsˈɛnt pɹˈɪsteɪn tˈuː,sˈɪks,tˈɛn,fˈoːɹtiːntˈɛtɹɐmˌɛθəlpˌɛnteɪdkˌeɪn, sˈiː nˈaɪntiːn ˈeɪtʃ fˈoːɹɾi.