1H-Pyrrol-1-yloxy, 3-((9H-fluoren-2-ylamino)carbonyl)-2,5-dihydro-1,1,5,5-tetramethyl- 3-((9H-Fluoren-2-ylamino)carbonyl)-2,5-dihydro-1,1,5,5-tetramethyl-1H-pyrrol-1-yloxy 55869-02-8