You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2,6,7,8,9-pentadeuterio-5-fluoro-4-(4,5,6,7-tetradeuterio-1-benzotellurophen-2-yl)-10-(trifluoromethyl)benzo[g]quinazoline by IUPAC nomenclature, provide its molecular formula.
user
C21H10F4N2Te
assistant