1,3,4-Oxadiazol-2(3H)-one, 5-(1,3-benzodioxol-5-yl)-3-(1-piperidinylmethyl)- 5-(1,3-Benzodioxol-5-yl)-3-(1-piperidinylmethyl)-1,3,4-oxadiazol-2(3H)-one 73484-52-3