9 letters · 15 points in Scrabble
noun a drug (trade name Capoten) that blocks the formation of angiotensin in the kidneys resulting in vasodilation; used in the treatment of hypertension and congestive heart failure
originFrom (mer)capto + pr(oline) + -yl or (mer)capto + pr(opion)yl.
Etymology from Wiktionary, CC BY-SA 3.0