You are a chemist. Now you are given a description of a molecule. Please generate a molecule that meets the description.
system
I need a molecule that meets the following conditions: It belongs to the fluorescent class of molecules. Please represent the molecule in SMILES.
user
O=C1c2c3cccccc-3cc2-c2scc(-n3c4ccccc4c4cc5c(cc43)oc3ccccc35)c21
assistant