https://digitalcommons.mtu.edu/michigantech-p/7334/
"Dominance of Δ5-sterols in eight species of the cactaceae" by Thomas A. Salt, Joel E. Tocker et al.
The sterols from eight species in seven genera of the Cactaceae are 24-alkyl-Δ5-sterols. In all eight species, Echinopsis tubiflora, Pereskia aculeata,...
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