You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the SMILES representation for [6-ethyl-2-(2-methoxypropan-2-yl)thieno[2,3-d]pyrimidin-4-yl]hydrazine ?
user
CCC1=CC2=C(NN)N=C(C(C)(C)OC)N=C2S1
assistant