Patent ID: 8883504

Claim:
A culture medium comprising a basic medium for animal cell culture and a stem cell differentiation inhibiting agent which comprises a low molecular weight compound represented by formula (6) or a salt thereof as an active ingredient, wherein R 1 and R 2 are hydrogen atoms; R 3 is a hydroxyl group or an acetoxy group; R 4 is an acetoxy alkyl group, a cyclic alkylaminoalkyl group which may contain an oxygen atom, a dialkylaminoalkyl group, a hydroxyalkylaminoalkyl group or a hydrogen atom; R 5 is a lower alkyl group or an arylaminovinyl group; R 6 is a nitro group; R 7 , R 8 and R 9 may be the same or different, each representing a lower alkyl group, a lower alkoxy group or a hydrogen atom.