英语释义
1. an indigo-forming substance C8H7NO4S found as a salt in urine and other animal fluids also its potassium salt C8H6KNO4S
2. a glucoside C14H17NO6 occurring especially in the indigo plant and being a source of natural indigo
3. a glucoside C14H17NO6 occurring especially in the indigo plant and being a source of natural indigo