Synthetic Studies on Penems and Carbapenems (VII). Compounds Derived by Cleavage of the $\beta$-Lactam Ring during (Alkylthio) thiocarbonylation of a 4-Mercapto-3-phenylacetamidoazetidin-2-one Derivative
Journal of the Korean Chemical Society.
1989.
Oct,
33(5):
545-550