You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 4-[2-[amino(hydroxy)methyl]-4-methyl-4,5-dihydro-[1]benzoxepino[5,4-d][1,3]thiazol-9-yl]-2-(5-methyl-1,2,4-oxadiazol-3-yl)but-3-yn-2-ol ?
user
C20H20N4O4S
assistant