title: 3-(4-Hy-droxy-3-meth-oxy-phen-yl)acrylic acid-2,3,5,6-tetra-methyl-pyrazine (2/1).
abstract: The asymmetric unit of the title compound, C(8)H(12)N(2)·2C(10)H(10)O(4), contains a tetra-methyl-pyrazine mol-ecule, situated about an inversion center, and two substituted acrylic acid derivatives. The dihedral angle between the phenyl and pyrazine rings is 69.45 (9)°. In the crystal, inter-molecular O-H⋯O, O-H⋯N hydrogen bonds and weak C-H⋯O inter-actions lead to the formation of a supra-molecular network. The acrylic acid side chain is positionally disordered [occupancy ratio 0.852 (7):0.148 (7)].
authors.affiliation: Department of Physical Chemistry, Guangdong Pharmaceutical University, Guangzhou, Guangdong 510006, People's Republic of China.
authors.forename: Zaiyou
authors.initials: Z
authors.lastname: Tan
authors.forename: Erjia
authors.initials: E
authors.lastname: Zhu
authors.forename: Lin
authors.initials: L
authors.lastname: Luo
authors.forename: Zhuohui
authors.initials: Z
authors.lastname: Lin
authors.forename: Ruisi
authors.initials: R
authors.lastname: Yan