Calyx nicaeensis

Cydopropanic adds are infrequent in the membrane phospholipids of sponges, but have nevertheless been reported in several spedes, such as Calyx nicaeensis, Chon-drosia reniformis, Homaxinella sp., Phakellia aruensis, Phyl-lospor ia papyracea, Pseudaxinyssa sp. and Rhopaloeides odorabile (Lankelma, Ayanoglu, and Djerassi, 1983 Gillan... 

Calyx nicaeensis Itoh etal., 1983a Tam Ha and Djerassi, 1989 Calyx podatypa... 

Gelliusterols A-D include a A5 tetracydic system and acetylenic side chains similar to those of their homologs in Calyx nicaeensis (see Figure 19.30) (Gallimore, Kelly, and Scheuer, 2001). 

Doss, G.A., Margot C., Sodano, G., and Djerassi, C. (1988) Biosynthetic studies of marine lipids. 21. Experimental demonstration of a biosynthetic interconversion of cyclopropane sterols in the sponge Calyx nicaeensis. Tetrahedron Lett., 29,6051-6054. 

Minale, L Riccio, R, Scalona, 0 Sodano, G Fattomsso, E Magno, S., Mayol, L, and Santacroce, C, (1977) Metabolism in porifera,Vll, Conversion of fucosterol into calysterol by the sponge Calyx nicaeensis. Experientia, 33,1550-1552,... 

Tam Ha, T.B. and Djerassi, C. (1989) Minor and trace sterols in marine invertebrates. 62. Novel coprostanols with unusual side chains from the marine sponge Calyx nicaeensis. Steroids, 53, 487 99. 

Steiner, E., Djerassi, C., Fattorusso, E., Magno, S., Mayol, L., Santacroce, C., and Sica, D. (1977) Isolation, structure elucidation and synthesis of new acetylenic steroids from the sponge Calyx nicaeensis. Hdv. Chim. Acta, 60, 475 81. 

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