Chemistry of lichen constituents—VII: Mass spectra of some pulvic acid derivatives

✍ Scribed by R. M. Letcher

• Publisher: John Wiley and Sons
• Year: 1968
• Tongue: English
• Weight: 426 KB
• Volume: 1
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210010606

✦ Synopsis

The mass spectra of three methoxypulvic dilactones, four methyl esters of methoxypulvic acids and five methyl ethers of pulvic acid derivatives have been measured and rationalised empIoying accurate mass measurements and metastable peak assignments to substantiate the proposed fragmentations and rearrangements. In particular, the mass spectral differences and similarities between the isomeric methoxypulvic dilactones, between their methanolysis products and between the isomeric methyl ethers, are rationalised.