You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N,N-dimethyl-2-[(6R)-4-(thiophen-2-ylmethyl)-1,11-dioxa-4,8-diazaspiro[5.6]dodecan-8-yl]ethanamine is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H29N3O2S
assistant