You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 4-amino-1-[(4R)-3-amino-3-(2-chloroethynyl)-4-hydroxy-5-[(1S)-1-hydroxyethyl]oxolan-2-yl]pyrimidin-2-one ?
user
C12H15ClN4O4
assistant