You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Under IUPAC nomenclature, a molecule named (3aS,4R,5R,7R,7aR)-N-cyclopentyl-4,5-dihydroxy-2-(4-methoxyanilino)-3a,4,5,6,7,7a-hexahydro-1,3-benzothiazole-7-carboxamide is given. What is its corresponding molecular formula?
user
C20H27N3O4S
assistant