(R)-Naroparcil is an isomer of Naroparcil. Naroparcil, a 4-methylumbelliferyl beta-D-xyloside analog, is associated with vascular smooth muscle cell proliferation and inhibits thrombus formation in the Wessler slough model.

The stems of Equisetum hyemale L.

Alismol has antihypertensive action, it decreases cardiac output, heart rate and left ventricular pressure, but it increases coronary flow, it has been used for the prevention of anginal attacks.