(2R,4R,5S,6R,7S)-6-hydroxy-4-(hydroxymethyl)-5-methoxy-3-oxa-1,8,18-triazaoctacyclo[13.12.2.02,7.08,29.09,14.016,20.021,28.022,27]nonacosa-9,11,13,15,20,22,24,26,28-nonaene-17,19-dione 在
sodium hydroxide 作用下,
反应 3.0h,
以91%的产率得到12,13-[1,2-(4-O-methyl-D-mannopyranosyl)]-6,7,12,13-tetrahydro-5,7-dioxo(5H)-indolo[2,3-a]furo[3,4-c]carbazole