| —— | (E)-6-benzylidene-4-ethyl-3,10-dioxo-3,4,6,7,8,10-hexahydro-1H-pyrano[3,4-f]indolizine-5-carboxylic acid | 145474-13-1 | C21H19NO5 | 365.386 | 
                                                                                                                                            
                                        | —— | 4-carbomethoxy-7-oxo-de-AB-deoxycamptothecin | 145474-12-0 | C15H15NO6 | 305.287 | 
                                                                                                                                            
                                        | —— | 4-Ethyl-3,6,10-trioxo-1,4,7,8-tetrahydropyrano[3,4-f]indolizine-5-carboxylic acid | 145474-14-2 | C14H13NO6 | 291.26 | 
                                                                                                                                            
                                        | —— | 4-ethyl-3,10-dioxo-1H,3H,4H,6H,7H,8H,10H-pyrano[3,4-f]indolizine-5-carboxylic acid methyl ester | 145474-08-4 | C15H17NO5 | 291.304 | 
                                                                                                                                            
                                        | —— | methyl 7-[1-(methoxycarbonyl)propyl]-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylate | 145474-07-3 | C15H19NO5 | 293.32 | 
                                                                                                                                            
                                        | —— | methyl 7-methoxycarbonylmethyl-5-oxo-1,2,3,5-tetrahydroindolizine-8-carboxylate | 145474-06-2 | C13H15NO5 | 265.266 |