ANALYSIS OF H-1-NMR SPECTRA OF FLUORENE AND AZAFLUORENES - LONG-RANGE COUPLING-CONSTANTS Статья FOMICHOV A.A., LAWANIEDOGIAWERIE S.O., PROSTAKOV N.S. ORGANIC MAGNETIC RESONANCE. JOHN WILEY & SONS LTD. Том 21. 1983. С. 310-314
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