You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1,3,10,11-tetrahydroxy-1-methyl-9-(methylsulfanylmethyl)-12-oxo-7-(piperidin-1-ylmethyl)-4,4a,5,5a,6,12a-hexahydrotetracene-2-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C28H36N2O6S
assistant