(41R,42R)-3,5,8-triaza-1(2,6)-pyridina-4(1,2)-cyclohexanacyclononaphan-6-one

(4R,9R,12S)-12-isopropyl-3,13-bis(2-nitrobenzenesulfonyl)-19-oxy-3,10,13,19-tetraazatricyclo[13.3.1.0(4,9)] nonadeca-1(19),15,17-trien-11-one

(4R,9R)-3,13-bis(2-nitrobenzenesulfonyl)-19-oxy-3,10,13,19-tetraazatricyclo[13.3.1.0(4,9)]nonadeca-1(19),15,17-trien-11-one