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MASS-SPECTROMETRY STUDY OF LINEAR AND ANGULAR 3',4'-DIOXYSUBSTITUTED DIHYDROPYRANOCOUMARINS AND THEIR DERIVATIVES

VOLTAGE MASS-SPECTRA OF MONOOXYDIHYDROPYRANOCOUMARINS AND MONOACYLOXYDIHYDROPYRANOCOUMARINS AND DIHYDROFUROCOUMARINS

MASS-SPECTROMETRY IDENTIFICATION OF LINEAR AND ANGULAR 3'-KETO-2', 2'-DIMETHYLDIHYDROPYRANOCOUMARINS

OBTAINING THE SUBSTITUTED PIPERIDINE AND PYRIDINE BASES WITH THE AID OF ENAMINES

INTERACTION OF CHALCONES WITH PHENYLHYDRAZINE

Reaction of chalcones with phenylhydrazine

SYNTHESIS OF ARYL-GAMMA-PYRIDYLMETHANES AND THEIR TRANSFORMATION INTO SUBSTITUTED BENZO[G]-ISOQUINOLINES

MASS-SPECTRA OF SILYLINDOLIZINES, DIHYDROSILANAPHTHOINDOLIZINE AND DIHYDROSILAAZAACEANTHRELENES

BENZOPYRIDOFULYENES

MASS-SPECTROMETRIC INVESTIGATION OF 2-OXO(THIOXO)TETRAHYDROPYRIMIDINE DERIVATIVES

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