title: Methyl-ergometrine maleate from synchrotron powder diffraction data.
abstract: The title compound {systematic name: 9,10-didehydro-N-[1-(hydroxy-meth-yl)prop-yl]-d-lysergamide maleate}, C(20)H(26)N(3)O(2) (+)·C(4)H(3)O(4) (-), contains a large rigid ergolene group. This group consists of an indole plane connected to a six-membered carbon ring adopting an envelope conformation and N-methyl-tetra-hydro-pyridine where the methyl group is in an equatorial position. In the crystal, inter-molecular N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds form an extensive three-dimensional hydrogen-bonding network, which holds the cations and anions together.
authors.forename: Jan
authors.initials: J
authors.lastname: Rohlíček
authors.forename: Michal
authors.initials: M
authors.lastname: Hušák
authors.forename: Bohumil
authors.initials: B
authors.lastname: Kratochvíl
authors.forename: Alexandr
authors.initials: A
authors.lastname: Jegorov