1. This paper is part 66 of the series ?On the Chemistry of Pyrrole Pigments? (part 652) and part 26 of ?Studies in Linear Dichroism? [part 25:ippitsch M. E., iegler M., ussenegg F. R., riedman N., heves M., azur Y., argulies L., Z. Naturforsch.40 C, 114 (1985); part 243].
2. Falk H., Fl�dl H., Monatsh. Chem.117, 57 (1986).
3. Margulies L., Friedmann N., Sheves M., Mazur Y., Lippitsch M. E., Riegler M., Aussenegg F. R., Tetrahedron41, 191 (1985).
4. For survey consult: Encycl. Plant Physiol.16 A and16 B (1983).
5. Schirmer T., Bode W., Huber R., Sidler W., Zuber H., The Crystal and Molecular Structure of C-Phycocyanin fromMastigocladus Laminosus and Its Implications for Function and Evolution, in: Optical Properties and Structure of Tetrapyrroles (Blauer G., Sund H., eds.). Berlin: W. de Gruyter. 1985.