Kong Y C, Lee C M, Wong M K, Xu S B
Gen Pharmacol. 1986;17(5):593-5. doi: 10.1016/0306-3623(86)90101-1.
Dehydroindicolactone, a novel linear furanocoumarin with an 8-substituted side chain carrying a 5-member ring lactone, showed spasmolytic activity in a number of smooth muscle preparations. The spasmolytic activity seems to lie in its ability to block the dihydropyridine-sensitive calcium channel.