... hp hydrazin hydrat vo dn xut (2,3,4,6-tetra -O- acetyl- -D- glucopyranosyl)isothiocyanat dung mụi dicloromethan Phn ng xy nh sau: AcO AcO AcO OAc O H2N-NH 2.H NCS OAc 2O AcO AcO O NH OAc 20oC NH ... (2,3,4,6-tetra -O- acetyl- -D- glycopyranosyl)thiosemicarbazide 2.1.1 Tng hp (2,3,4,6-tetra -O- acetyl- -D- glucopyranosyl)thiosemicarbazide AcO AcO OAc OAc O NCS N2H4.H 2O O AcO AcO H OAc OAc NH C NH NH2 S Ho tan ... thc s khoa hc 2.3.2.2 Trng Th Thu Cinamaldehyd 4-(2,3,4,6-tetra -O- acetyl- -D- galactopyranosyl) thiosemicarbazon CHO OAc O AcO AcO NH H C OAc + NH NH2 S C2H5OH/CH3COOH MW OAc O AcO AcO NH H OAc C...