Tetrahedron. - 1968. - Vol.24. - No.15. - P.5439-5456.
J. Skolik, P. J. Krueger
Correlation between the stereochemistry of quinolizidine alkaloids and their infrared spectra from 2840-2600 CM-1
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http://dx.doi.org/10.1016/S0040-4020(01)96339-2Спасибо!