4-pentene-2,3-diol, 1-chloro-, (2R,3R)- InChI=1/C5H9ClO2/c1-2-4(7)5(8)3-6/h2,4-5,7-8H,1,3H2/t4-,5+/m1/s rel-(2R,3R)-1-chloropent-4-ene-2,3-diol