A phosphaplatin complex selected from the group consisting of: (i) (1R, 2R) -anthomerically pure pyrodach-2 having the formula (I), ** Formula ** or its pharmaceutically acceptable salts or solvates; (ii) (1S, 2S) -anthomerically pure pyrodach-2 having the formula (II), ** Formula ** or its pharmaceutically acceptable salts or solvates; (iii) cis-pyrodach-2 having the formula (III), ** Formula ** or its pharmaceutically acceptable salts or solvates; (iv) (1R, 2R) -anthomerically pure pyrodach-4 having the formula (IV), ** Formula ** or its pharmaceutically acceptable salts or solvates; (v) (1S, 2S) -anthomerically pure pyrodach-4 having the formula (V), ** Formula ** or its pharmaceutically acceptable salts or solvates; and (vi) cis-pyrodach-4 having the formula (VI), ** Formula ** or its pharmaceutically acceptable salts or solvates.Un complejo de fosfaplatino seleccionado del grupo que consiste en: (i) (1R,2R)-pyrodach-2 enantioméricamente puro que tiene la fórmula (I),**Fórmula** o sus sales o solvatos farmacéuticamente aceptables; (ii) (1S,2S)-pyrodach-2 enantioméricamente puro que tiene la fórmula (II),**Fórmula** o sus sales o solvatos farmacéuticamente aceptables; (iii) cis-pyrodach-2 que tiene la fórmula (III),**Fórmula** o sus sales o solvatos farmacéuticamente aceptables; (iv) (1R,2R)-pyrodach-4 enantioméricamente puro que tiene la fórmula (IV),**Fórmula** o sus sales o solvatos farmacéuticamente aceptables; (v) (1S,2S)-pyrodach-4 enantioméricamente puro que tiene la fórmula (V),**Fórmula** o sus sales o solvatos farmacéuticamente aceptables; y (vi) cis-pyrodach-4 que tiene la fórmula (VI),**Fórmula** o sus sales o solvatos farmacéuticamente aceptables.