Collect. Czech. Chem. Commun.
1974, 39, 3144-3146
https://doi.org/10.1135/cccc19743144
Synthesis of 1,1-diethyl-4-(D-6-methyl-8-ergolin-I-yl)semicarbazine and its isoergolin-I-yl and isoergolin-II-yl isomers
V. Zikán, K. Řežábek and M. Semonský