2-biphenyl-2-yl-4-methyl-3-oxo-valeronitrile

乙基9H-芴-9-羧酸酯

ethyl (9-isopropylfluoren-9-yl)carboxylate

9-乙酰基菲

toluene-4-sulfonic acid-(9-isopropyl-fluoren-9-ylmethyl ester)