Forty‐eight compounds have been identified in the essential oil from Nigella sativa (black cumin) seeds, 14 of which are volatiles that have never been isolated from black cumin before. This is the first time to show two monoterpenoids: cis ‐ and trans ‐4‐methoxythujane, occur naturally in plants, specifically in the essential oil from N. sativa seeds in 0.3% and 4%, respectively. The structures of the 4‐methoxythujanes were established by both spectroscopic and chemical methods.
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Wajs‐Bonikowska et al. (2008) studied this question.
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