(1R,3R)-2-oxocyclopentane-1,3-diyl bis(thiocyanate) InChI=1/C7H6N2OS2/c8-3-11-5-1-2-6(7(5)10)12-4-9/h5-6H,1-2H2/t5-,6-/m1/s thiocyanic acid, (1R,3R)-2-oxo-1,3-cyclopentanediyl ester