| Answer | Crossword Clue |
|---|---|
| digitoxin | a poisonous glycoside that is the most active ingredient of digitalin |
| digitoxins | DIGITOXIN, a poisonous glycoside that is the most active ingredient of digitalin |
| cantharidin | a bitter crystalline compound that is the active blister-producing ingredient of cantharides |
| cantharidins | CANTHARIDIN, a bitter crystalline compound that is the active blister-producing ingredient of cantharides |
| physostigmine | A compound that is the active ingredient of the Calabar bean and is used medicinally in eye drops because of its anticholinergic activity |
