Collect. Czech. Chem. Commun.
1983, 48, 928-936
https://doi.org/10.1135/cccc19830928
The synthesis and the mass spectra of 28,29,30-trinoroleanane derivatives with a double bond in the ring E or D
Jiří Protiva, Václav Křeček, Josefa Křečková, Eva Klinotová and Alois Vystrčil
Department of Organic Chemistry, Charles University, 128 40 Prague 2
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