UOG uog (2R,5S,11S,14S,18E)-2,11,17,17-tetramethyl-14-(propan-2-yl)-15-oxa-3,9,12,26,29-pentaazatetracyclo[18.5.3.1~5,9~.0~23,27~]nonacosa-1(25),18,20(28),21,23,26-hexaene-4,10,13,16-tetrone UOG