You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 2-[3-[(5Z)-5-benzylidene-2,4-dioxo-1,3-thiazolidin-3-yl]propanoylamino]-5-hydroxybenzoic acid ?
user
C20H16N2O6S
assistant