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Last Updated: December 16, 2025

Claims for Patent: 5,317,016

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Summary for Patent: 5,317,016

Title:	Pyrrolidylthiocarbapenem derivative
Abstract:	A pyrrolidylthiocarbapenem derivative represented by Formula I is provided: ##STR1## wherein R1 is hydrogen or lower alkyl; R2, R3 and R4 are hydrogen, lower alkyl which can be substituted or an amino protecting group independently, or R2 and R3 together with a nitrogen atom to which R2 and R3 are bonded form a saturated or unsaturated cyclic group, or R2 and R4, or R3 and R4 together with two nitrogen atoms and one sulfur atom in the sufamide group form a saturated or unsaturated cyclic group; each cyclic group can further include at least one atom selected from the group consisting of oxygen, sulfur and nitrogen, and each cyclic group can be substituted; X1 is hydrogen or a hydroxy protecting group; X2 is hydrogen, a carboxy protecting group, an ammonio group, an alkali metal or an alkaline-earth metal; and Y2 is hydrogen or an amino protecting group.
Inventor(s):	Yasuhiro Nishitani, Tadashi Irie
Assignee:	SHIONGI SEIYAKU KK, Shionogi and Co Ltd
Application Number:	US07/929,961
Patent Claims:

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