4-O-alpha-L-gulopyranosyl-alpha-L-gulopyranose InChI=1/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2/t3-,4-,5+,6-,7+,8-,9-,10+,11+,12-/m0/s alpha-L-gulopyranose, 4-O-alpha-L-gulopyranosyl-