Predict the flash point of O=C1C=Cc2ccc3c4c(ccc1c24)C=CC3=O.
The flash point is 450.950 K.
{#Task: |Task: |!}{#Predict|Estimate!} the {flashpoint__names__noun} of {SMILES#}.
{#Answer: |A: |!}The {flashpoint__names__noun} is {flashpoint#} {flashpoint__units}.