Composition, structure and biogenesis of the ketones in rose flower wax

New Fatty Acid Esters and Hydroxy Ketones from Fruits of Laurus nobilis

“…The hydroxyl group at C-20 is supported by the significant a fission ions at mlz 185, 155, and 297. As in 1, the absence of an [M -15]+ ion further established the straight chain nature of the compound, and the presence of an [ + 1]+ ion is characteristic of an asymmetrical ketone (13)(14)(15). Following the above observations, compound 4 has been characterized as 11-hydroxytriacontan-9-one [4].…”

Constituents of High Altitude Himalayan Herbs, Part III. New Alkane Hydroxyketones from Tanacetum nubigenum

“…The appearance of two series of peaks, mlz 41, 55, 69 and 43, 57, 71, 85, with fragments differing by 14 mass units suggested the presence of a long straight methylene chain (3). This was further supported by the absence of an [M -15]+ peak (4). In addition, the presence of an { + 1]+ peak is characteristic of an unsymmetrical ketone (3).…”

“…2Address for correspondence: 3 Sleepy Hollow Lower, Kumaon University, Nainital 263001, Uttar Pradesh, India. (3,4). The long chain nature of the compound was also supported by two series of fragments with a uniform loss of 14 mass units (3).…”

Long-Chain Molecules with Agro-Bioactivities and Their Applications

“…It is noteworthy that many long-chain fatty acids exhibit significant biological activity. For instance, scleropyric acid demonstrates anti-plasmodial activity, 2-hexadecynoic acid (1) (Figure 2) and 2-alkynoic fatty acid have been found to exhibit antibacterial activity against mycobacterium tuberculosis, and linoleic acid exhibits antifungal activity [8][9][10]. Furthermore, oleic acid has been shown to possess antifungal effects against Rhizoctonia solani, Pythium ultimum, Pyrenophora avenae, and Crinipellis perniciosa [5,11].…”

“…Tridemorph (8) belongs to the morpholine fungicides [33]; it is a systemic fungicide, as it is taken up by the leaves and roots. It acts as an inhibitor of ergosterol biosynthesis, especially through the inhibition of sterol reduction (sterol-Δ 14 -reductase) and isomerization (Δ 8 to Δ 7 -isomerase) [34].…”