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Nigella sativa Oil
Although black cumin (Nigella sativa L.) is used across numerous countries as a condiment, small quantities of oil are also produced for commercial sale.
El-Alfy et al.(1975) found that a crystalline substance precipitated when an Egyptian oil of N. sativa was subjected to refrigeration. Using a combination of spectroscopic techniques, the structure of the compound was elucidated and found to be thymohydroquinone.
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