(E)-1-(2-Hydroxy-4,6-dimethoxyphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one from Kaempferia rotunda Val.

(E)-1-(2-Hydroxy-4,6-dimethoxyphenyl)-3-(4-methoxyphenyl)prop-2-en-1-one from Kaempferia rotunda Val.

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The planar –CH=CHC(=O)– fragment (r.m.s.

deviation = 0.074 Å) in the title compound, C18H18O5, connects the planar hydroxydimethoxyphenyl (r.m.

s.deviation = 0.039 Å) and methoxylphenyl (r.

m.s.deviation toyo proxes st iii 305/40r22 = 0.

021 Å) parts.The central fragment forms a great neck chisels dihedral angle of 13.7 (1)° with the hydroxydimethoxyphenyl part and 32.

0 (1)° with the methoxyphenyl part.The hydroxy group forms an intramolecular hydrogen bond to the carbonyl O atom.