flavors. We have not experimentally evaluated the furanones in either leek or shallot oil; however, due to their overall similarity to onion oil, we suspect the fur anones play no significant flavor role in these products.
The defensive secretion of the nudibranch Phyllidia varicosa consists of two isocyanosesquiterpenes: the previously described 9‐isocyanopupukeanane (1), and its 2‐isomer (4), for which we report the structure and properties. The mixture originates with a sponge, Hymeniacidon sp., where it is produced in varying proportions. CD. measurements and X‐ray diffraction data establish the absolute configuration of the two metabolites.
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