trans-N-cyano-N'-(6-cyano-3,4-dihydro-3-hydroxy-2,2-dimethyl-2H-1-benzopyran-4-yl)-N''-(1,1-dimethylpropyl)guanidine
trans-n-cyano-n'-(6-cyano-3,4-dihydro-3-hydroxy-2,2-dimethyl-2h-1-benzopyran-4-yl)-n''-(1,1-dimethylpropyl)guanidine