- February 23, 2023(S)-3-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-6-(3-((2,2,4,6,7-pentamethyl-2,3-dihydrobenzofuran-5-yl)sulfonyl)guanidino)hexanoic acid (cas: 401915-53-5) belongs to benzofurans derivatives. Benzofuran derivatives are one of the most important oxygen-containing heterocycles. Introduction of…