Flurtamone, 5-methylamino-2-phenyl-4-(3-trifluoromethylphenyl) furan-3
(2H)-one, C18H14F3NO2, is a weed killer. The phenyl substituents are r
otated by about 30 and 72 degrees from the mean plane of the central f
ive-membered ring, while the methylamino substituent lies almost withi
n this plane.