The Jeffrey pine is noted for producing exceptionally high levels of n-heptane in its resin, for which reason its distillate was designated as the zero point for one octane rating.
ðə dʒˈɛfɹi pˈaɪn ɪz nˈoʊɾᵻd fɔːɹ pɹədˈuːsɪŋ ɛksˈɛpʃənəli hˈaɪ lˈɛvəlz ʌv ˈɛnhˈɛpteɪn ɪn ɪts ɹˈɛzɪn, fɔːɹ wˌɪtʃ ɹˈiːzən ɪts dˈɪstɪlˌeɪt wʌz dˈɛzɪɡnˌeɪɾᵻd æz ðə zˈiəɹoʊ pˈɔɪnt fɔːɹ wˈʌn ˈɑːkteɪn ɹˈeɪɾɪŋ.