56364-22-8 BRN 1460601 Methanehydrazonamide, N'-(1,2-dihydro-2-oxo-3H-indol-3-ylidene)-N,N-dimethyl- N'-(1,2-Dihydro-2-oxo-3H-indol-3-ylidene)-N,N-dimethylmethanehydrazonamide