title: Benzyl N-(1-{N'-[(E)-2,3-dihy-droxy-benzyl-idene]hydrazinecarbon-yl}-2-hy-droxy-eth-yl)carbamate dihydrate.
abstract: The organic mol-ecule in the title dihydrate, C(18)H(19)N(3)O(6)·2H(2)O, adopts a twisted U-shape with the major twists evident about the chiral C atom [the C-N-C-C torsion angle is -88.2 (4) °] and about the oxygen-benzyl bond [C-O-C-C = 74.2 (4) °]. The conformation about the imine bond [1.290 (4) Å] is E and an intra-molecular O-H⋯N hydrogen bond helps to establish the near coplanarity of the hy-droxy-benzene and hydrazine groups. The crystal packing features O-H⋯O and N-H⋯O hydrogen bonds, leading to two-dimensional supra-molecular arrays in the ab plane with weak C-H⋯π connections between the arrays.
authors.forename: Solange M S V
authors.initials: SM
authors.lastname: Wardell
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink
authors.forename: Marcus V N
authors.initials: MV
authors.lastname: de Souza
authors.forename: Alessandra C
authors.initials: AC
authors.lastname: Pinheiro
authors.forename: James L
authors.initials: JL
authors.lastname: Wardell
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Mar 31;66(Pt 4):o1004-5
references.pmid: 21580568
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2010 Nov 20;66(Pt 12):o3253-4
references.pmid: 21589538
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Aug 1;67(Pt 8):o1888-9
references.pmid: 22090940
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Jul 1;67(Pt 7):o1868-9
references.pmid: 21837231
references.citation: J Asian Nat Prod Res. 2009;11(3):274-80
references.pmid: 19408153
references.citation: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references.pmid: 18156677
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Feb 09;67(Pt 3):o581-2
references.pmid: 21522343
references.citation: Acta Crystallogr Sect E Struct Rep Online. 2011 Jul 1;67(Pt 7):o1866-7
references.pmid: 21837230