6,7-Dimethoxy-2-ethoxycarbonyl-1,2-dihydroisoquinaldonitrile

6,7-Dimethoxy-2-benzoyl-1-diphenylmethyl-1-cyano-1,2-dihydroisochinolin

1,2-dihydro-6,7-dimethoxy-2-(4-methylbenzoyl)isoquinoline-1-carbonitrile

(1Z)-6,7-dimethoxy-1-(nitrosomethylidene)-2H-isoquinoline