Type III secretion system (TTSS) is a common virulence
system present in many Gram-negative bacteria. As
described in the preceding study, a conventional assay
system was conducted by using TTSS-induced hemolysis in
screen for TTSS inhibitors from microbial metabolites [1].
As a result, we discovered six new compounds designated
guadinomines A (1) to D (5) and guadinomic acid