X-ray structure of the complex between RNase A and compound 4-PF6 ([(PPh3)Au(mi-pbi)Pt(Me)(DMSO)][PF6]), the heterobimetallic derivative obtained in the reaction between the organometallic compound [Pt(pbi)(Me)(DMSO)], pbi=2-(2\'-pyridil)benzimidazole (compound 3) and the gold(I) compound [Au(Ph3P)][PF6]
