26993-30-6 26993-39-5 4-Octadecene-1,3-diol, 2-amino-, 1-(dihydrogen phosphate), (2S,3R,4E)- 4-Octadecene-1,3-diol, 2-amino-, 1-(dihydrogen phosphate), (R-(R*,S*-(E)))- Sphingosine 1-phosphate Sphingosine-1-phosphate