compound L-fuculose CHEBI:17617 UPa:UPC01721 InChI=1S/C6H12O5/c1-3(8)5(10)6(11)4(9)2-7/h3,5-8,10-11H,2H2,1H3/t3-,5+,6-/m0/s1 compound KEGG:C01721 C6H12O5