Imipenem Impurity A
CAS No. 59995-64-1
C11H16N2O4S
M.W. 272.33

Imipenem EP Impurity B
CAS No. 1197869-90-1
C12H19N3O5S
M.W. 317.37

Imipenem Impurity 5
CAS No. 1193105-97-3
C12H19N3O5S
M.W. 317.36

Imipenem Impurity 4
CAS No. 85604-01-9
C23H30N4O8S2
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