You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3R,4S,5R)-2-(6-aminopurin-9-yl)-5-methanidyloxolane-3,4-diol;3-[(1R,2S,3S,5Z,7S,8S,10Z,13S,15Z,17R,18R,19R)-2,7-bis(2-amino-2-oxoethyl)-3,13,17-tris(2-carboxylatoethyl)-18-(carboxylatomethyl)-1,2,5,7,12,12,15,17-octamethyl-8,13,18,19-tetrahydro-3H-corrin-24-id-8-yl]propanoate;cobalt(3+) is the IUPAC name of a molecule. Please give its molecular formula.
user
C55H68CoN11O15-4
assistant