Carbamic acid, N-[[[2-[[4-[4-(3-bromo-4-fluorophenyl)-4,5-dihydro-5-oxo-1,2,4-oxadiazol-3-yl]-1,2,5-oxadiazol-3-yl]amino]ethyl]amino]sulfonyl]-, 9H-fluoren-9-ylmethyl ester 1771804-78-4