1. 1. Four individual porphyrin compounds were isolated from West Surgunt crude oil. 2. 2. The porphyrins identified by PMR-spectrometry were: 13,15-ethane-3,8,17-triethyl-2,7,12,18-tetramethylporphyrin, 13,15-ethane-8,17-diethyl-2,3,7,12,18-pentamethylporphyrin, 13,15-diethyl-2,7,12,18-tetramethylporphyrin and 3,8-diethyl-2,7,12,13,17,18-hexamethylporphyrin. 3. 3. The formation of porphyrins of West Surgunt crude oil from chlorophylls a and c was shown to be possible.
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