Acta Cryst. (2008). E64, o1986  [ doi:10.1107/S160053680802970X ]

Pheophorbide b ethyl ester from a chlorella vulgaris dietary supplement

C. F. Chee, N. A. Rahman, S. M. Zain and S. W. Ng

Abstract: 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-HN hydrogen bonds [NN = 2.713 (5)-3.033 (6) Å].

Online 24 September 2008

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