论文信息 - Pheophorbide b ethyl ester from a chlorella vulgaris dietary supplement

Pheophorbide b ethyl ester from a chlorella vulgaris dietary supplement

In the title compound, C37H38N4O6, four five-membered nitrogen-bearing rings are nearly coplanar. Two N atoms in two these five-membered rings have attached H atoms, which contribute to the formation of intramolecular N—H⋯N hydrogen bonds [N⋯N = 2.713 (5)–3.033 (6) Å].

[1] G. G. Stokes. "J." , 1890, The New Yale Book of Quotations.

[2] Leonard J. Barbour,et al. X-Seed — A Software Tool for Supramolecular Crystallography , 2001 .

[3] Kevin M. Smith,et al. Structure and Conformation of Photosynthetic Pigments and Related Compounds. 10. Comparison of a Phytochlorin and Phytoporphyrin Derived from Chlorophyll a , 1997 .

[4] G. Sheldrick. A short history of SHELX. , 2008, Acta crystallographica. Section A, Foundations of crystallography.

[5] Melvin Calvin,et al. Crystal and molecular structure of methyl pheophorbide with applications to the chlorophyll arrangement in photosynthetic lamellae , 1972 .