| —— | 
                                        methyl trans-4-(4-chlorobutyrylamido)-6-cyano-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-3-carboxylate | 
                                        134256-01-2 | 
                                        C18H21ClN2O4 | 
                                        364.829 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        methyl trans-6-cyano-3,4-dihydro-2,2-dimethyl-4-(2-oxopyrrolidin-1-yl)-2H-1-benzopyran-3-carboxylate | 
                                        134256-02-3 | 
                                        C18H20N2O4 | 
                                        328.368 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        trans-6-cyano-3,4-dihydro-2,2-dimethyl-4-(2-oxopyrrolidin-1-yl)-2H-1-benzopyran-3-carboxylic acid | 
                                        134256-03-4 | 
                                        C17H18N2O4 | 
                                        314.341 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        trans-6-cyano-3,4-dihydro-2,2-dimethyl-3-methoxymethyl-4-(2-oxopyrrolidin-1-yl)-2H-1-benzopyran | 
                                        134256-06-7 | 
                                        C18H22N2O3 | 
                                        314.384 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        trans-6-cyano-3,4-dihydro-2,2-dimethyl-4-(2-oxopyrrolidin-1-yl)-2H-1-benzopyran-3-carbaldehyde | 
                                        134256-05-6 | 
                                        C17H18N2O3 | 
                                        298.342 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        trans-6-cyano-3,4-dihydro-3-hydroxymethyl-2,2-dimethyl-4-(2-oxopyrrolidin-1-yl)-2H-1-benzopyran | 
                                        134256-04-5 | 
                                        C17H20N2O3 | 
                                        300.357 | 
                                    
                                                                                                                                            
                                        | —— | 
                                        trans-6-cyano-3-fluoromethyl-3,4-dihydro-2,2-dimethyl-4-(2-oxopyrrolidin-1-yl)-2H-1-benzopyran | 
                                        134256-07-8 | 
                                        C17H19FN2O2 | 
                                        302.348 |