Mass spectra of tile principal dihydroisocoumarins of Ononis natrix (3i-e) and some related compounds (111/1 b, 2a-e & 3a-e) Ire discussed. The mass fragmentation patterns Ire assigned with tile help of EIMS. The molecular. formulae Octal compounds Ire also confirmed by elemental analysis.
NASIM H RAMA ,A SAEED ,MUHAMMAD T HUSSIAN ,CLIVE W BIRD ,ABDUL R RAZA ,
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