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 [(13S,15R,17E)-17-methoxyimino-13-methyl-15-[3-[(5-methyl-1,3-thiazol-2-yl)amino]-3-oxopropyl]-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-3-yl] 2-chloroacetate ?
user
C28H34ClN3O4S
assistant