**Selected date 14: FAB-MS (M++1) 1022.12920, C73H20NO7 requires 1022.12398; 13C NMR (62.5 MHz, CS2-2[H]6acetone) 153.8 (C=O), 143.9 (4C), 143.8 (4C), 143.5 (4C), 143.4 (2C), 143.2 (4C), 142.7 (2C), 142.5 (8C), 141.9 (4C), 141.8 (4C), 141.4 (2C), 141.0 (8C), 139.7 (4C), 139.1 (4C), 139.0 (4C), 107.9 (quat. C), 106.9 (quat. C), 95.0 (CH), 79.5 (2C), 69.8 (CH), 69.7 (CH), 69.1 (CH), 65.5 (CH), 64.3 (CH), 24.8 (CH3), 24.7 (CH3), 23.5 (CH3), 23.2 (CH3); FTIR max 1750 (s, C=O), 527 (fullerene) cm-1