title: 2-Acetamido-3-(4-hydr-oxy-3-methoxy-phen-yl)acrylic acid.
abstract: In the title compound, C(12)H(13)NO(5), the azlactone of vanillin, the acrylic acid side chain has a trans extended conformation. There are inter-molecular N-H⋯O and O-H⋯O hydrogen bonds in the crystal structure.
authors.forename: Xiao-Bing
authors.initials: XB
authors.lastname: Lan
authors.forename: Ye-Fei
authors.initials: YF
authors.lastname: Nan
authors.forename: Lin
authors.initials: L
authors.lastname: Chen
authors.forename: Shi-Xiang
authors.initials: SX
authors.lastname: Wang
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Zheng