label: N''-cyano-N-(6-amino-3,4-dihydro-3-hydroxy-2-methyl-2-dimethoxymethyl-2H-benzopyran-4-yl)-N'-benzylguanidine
label_lc: n''-cyano-n-(6-amino-3,4-dihydro-3-hydroxy-2-methyl-2-dimethoxymethyl-2h-benzopyran-4-yl)-n'-benzylguanidine