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 (3R)-3-hydroxy-3-[(E,2S)-6-[4-(2-hydroxyethyl)triazol-1-yl]hex-3-en-2-yl]-1-prop-2-enylindol-2-one ?
user
C21H26N4O3
assistant