(CF3)2CB 1-O-Methyl-di-N-trifluoroacetyl-beta-chitobioside 76418-42-3 beta-D-Glucopyranoside, methyl 2-deoxy-4-O-(2-deoxy-2-((trifluoroacetyl)amino)-beta-D-glucopyranosyl)-2-((trifluoroacetyl)amino)-