You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-2-(3-butyl-6-morpholin-4-yl-4-oxoquinazolin-2-yl)sulfanyl-N-(3-methylphenyl)butanamide into molecular formula.
user
C27H34N4O3S
assistant