作者:Tam�s L�r�nd、Andr�s F�ldesi、Ferenc Aradi
DOI:10.1007/bf00809366
日期:1991.3
The tautomerism of the title compounds was investigated by H-1, C-13-NMR and UV spectroscopy. Compound 5 was compared with respect to its spectra with those of appropriate model compounds 1,3,4, and 6. This gave evidence that 5 predominates in the tautomeric form 5A.