Fedoseev SV, Ershov OV, Belikov MY, Tafeenko VA. Synthesis of 3-amino-8-hydroxy-1,6-dioxo-4-cyano-2,7-diazaspiro[4.4]non-3-en-2-ides ammonium salts.
RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI:
10.1134/s107042801608008x]
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