(5S-5-Benzamido-4-oxo-6-phenylhexanoyl-L-proline) 74075-33-5 Compound 20 Ketoace Ketomethylene analog of Bz-phe-gly-pro L-Proline, 1-(5-(benzoylamino)-1,4-dioxo-6-phenylhexyl)-, (S)- Sri 20