Electron ionization mass spectra of bis-(3-methyl-3-undecyl- and 3-pentadecyl-6.Sdimethoxyisochroman-S-yl)methanes (la-c) and 3-(methyl, undecyl and pentadecyl)-6,Sdimethoxyisochromans (la-c) are studied with the help of LREIMS. The molecular formulae of these compounds are further confimed by HREIMS peak. Matching of molecular ion peaks exhibited by EIMS.
AAMER SAEED ,MUHAMMAD T HUSSIAN ,NASIM H RAMA ,
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