[Chemical constituents of grub and grub eye drops]

The chemical constituents of grub (Holotrichia diomphalia Bates.) were systematically analyzed. The results showed that grab contained amino acids, polypeptide or protein, carbohydrate, alkaloid, organic acid, steroid et al. The analysis of amino acids in the hydrolysate in grub eye drops showed the content of Glu and Gly was high, which occupied 40.33% of total amino acids in the hydrolysate. We inferred that Glu and Gly might be the active principle on catatract and nebula.