You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
Generate a molecule that fulfills the requirement: The molecule is a fgfr4 inhibitor and belongs to the cancer treatment class of molecules.
user
COCC(C)Oc1cc(NC(=O)N2CCCc3cc(CN4CC=COCC4=C=O)c(C=O)nc32)ncc1C#N
assistant