Studies on γ-Butyrolactone Derivatives.V-VII. V. On the α-Ureido- and α-Thioureido-γ-butyrolactone Derivatives

Rokuro SUDO
1959 Nippon kagaku zassi  
doi:10.1246/nikkashi1948.80.8_924 fatcat:oimtort6nzbdfkouzys3igag6i