ISSN:
1572-8854
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract The methanol adduct of powerine [methyl 10,17-dihydroxy-(16β,17β,20α)-yohimban-16-carboxylate], C21H26N2O4. CH3 OH, crystallizes in the orthorhombic space groupP212121 (no. 19) with cell dimensionsa = 8.558(3),b = 14.162(7),c = 16.993(7) Å. The crystal and molecular structure has been determined by X-ray diffraction analysis and refined using full-matrix least squares methods to a reliability index,R, of 0.090 with 1139 observed (F⩾ 2.5σ F ) intensities. With the configuration at C15 arbitrarily assigned α those at the chiral centers C3-H, C16-CO2Me, C17-OH and C20-H are respectively α,β,β,α: theC-D ring junction istrans and that ofD-E iscis. All bond lengths and bond angles are normal.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01239672
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