| —— | (1S,2S,3'S,5S)-allyl 1'-methoxy-2',9-dioxo-6-oxaspiro[bicyclo[3.2.2]nonane-4,3'-indoline]-2-carboxylate | 1341221-86-0 | C20H21NO6 | 371.39 | 
                                                                                                                                            
                                        | —— | (1S,3'S,5S)-1'-methoxy-2',9-dioxo-6-oxaspiro[bicyclo[3.2.2]non[2]ene-4,3'-indoline]-2-carbaldehyde | 1341221-81-5 | C17H15NO5 | 313.31 | 
                                                                                                                                            
                                        | —— | ((1S,3'S,5S)-1'-methoxy-2',9-dioxo-6-oxaspiro[bicyclo[3.2.2]non[2]ene-4,3'-indolin]-2-yl)methyl pivalate | 1341221-79-1 | C22H25NO6 | 399.444 | 
                                                                                                                                            
                                        | —— | [(1S,6R,7R)-7-[(E)-(1-methoxy-2-oxoindol-3-ylidene)methyl]-5-trimethylsilyloxy-3-oxabicyclo[4.1.0]hept-4-en-7-yl]methyl 2,2-dimethylpropanoate | 1397715-56-8 | C25H33NO6Si | 471.626 |