2,2,6-trimethyl-2,3-dihydro-4H-chromen-4-one (2,2,6-trimethyl-2,3-dihydro-4H-chromen-4-ylidene)hydrazone (non-preferred name) InChI=1/C24H28N2O2/c1-15-7-9-21-17(11-15)19(13-23(3,4)27-21)25-26-20-14-24(5,6)28-22-10-8-16(2)12-18(20)22/h7-12H,13-14H2,1-6H Limnazine N,N'-Bis(2,2,6-trimethylchroman-4-ylidene)azine N,N'-Bis-(2,2,6-trimethyl-chroman-4-ylidene)-hydrazine