What is "thienamycin"

n. One of the most potent naturally-produced antibiotics known, first obtained from ''Streptomyces cattleya'' in 1976.

Thienamycin, one of the most potent naturally produced antibiotics known thus far, was discovered in Streptomyces cattleya in 1976. Thienamycin has excellent activity against both Gram-positive and Gram-negative bacteria and is resistant to bacterial β-lactamase enzymes. Thienamycin is a zwitterion at pH 7.