ān jī pú táng
glucosamine (abbr. for 氨基葡萄糖[an1 ji1 pu2 tao5 tang2])
氨
ān
ammonia
基
jī
(bound form) base; foundation
葡
pú
abbr. for 葡萄牙[Pu2 tao2 ya2]
糖
táng
old variant of 糖[tang2]