1 The aglycone is coumarin 2 Examples of this is __ which is reported to dilate the coronary arteries as well as block calcium channels. 3 It has long been known that animals fed sweet clover (Melilotus officinalis, Fabaceae) die from __ The poisonous compound responsible for this adverse effect was identified as __. 4 A number of compounds have been synthesized based on the dicoumarol structure, examples is __ which has __ effect