Exohedral metal-C60 complexes exhibit unique physicochemical properties as a result of the metal cluster centers.1 This is important in the study of the reactivity and electrochemical properties of exohedral metal-C60 complexes, as it might result in the development of new nanomaterials.2 Kräutler et al. developed the orthogonal transposition method to synthesize C60 tetrakis-adducts with all addends located on the equatorial belt and the trans-1 positions available for further functionalizations.3 The presence of the tetrakis[di(ethoxycarbonyl)methano] groups should limit the number of possible bis-adduct regioisomers observed. We report that tetrakis[di(ethoxycarbonyl)-methano]-C60 reacts with triruthenium clusters to form the first anti-isomer C60-metal cluster complex : anti-[Ru3(CO)9]2{μ3-η2,η2,η2-C60[C(COOC2H5)2]4}. The two triruthenium groups are found in either an anti or a syn orientation, as determined by NMR. Only the anti form was characterized by X-ray crystallography, see structure below.