… chemically pure, other than sucrose, lactose, maltose, glucose and fructose; sugar ethers, sugar acetals and sugar …
Explanatory notes
… chemically pure, other than sucrose, lactose, maltose, glucose and fructose; sugar ethers, sugar acetals and sugar … bearing a hydroxyl group and a hydrogen atom. The heading excludes : a) Sucrose, this, even when chemically pure , …