title: 2'-Amino-3-methoxypyrimidino[5',4':16,17]estra-1,3,5(10),16-tetraene.
abstract: In the title compound, C21H25N3O, the six-membered ring that is fused to two other six-membered rings in the estrane moiety adopts an envelope conformation. The compound shows intermolecular hydrogen bonding of the amine group to an N atom of the pyrimidine moiety, as well as weak intermolecular interactions involving H atoms in the hydrophobic residue of the molecule.
authors.affiliation: Interdisciplinary Graduate School of Engineering, Kyushu University, 6-1 Kasuga-koh-en, Kasuga-shi, Fukuoka 816-8580, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Taisuke
authors.initials: T
authors.lastname: Matsumoto
authors.forename: Masataka
authors.initials: M
authors.lastname: Watanabe
authors.forename: Shuntaro
authors.initials: S
authors.lastname: Mataka
authors.forename: Thies
authors.initials: T
authors.lastname: Thiemann
mesh_terms: D018360:Crystallography, X-Ray; D004962:Estranes / Q000737:chemistry*; D006860:Hydrogen Bonding; D008968:Molecular Conformation; D015394:Molecular Structure; D011743:Pyrimidines / Q000737:chemistry*
chemical_list: D004962:Estranes; D011743:Pyrimidines