| —— | tert-butyl 20E-[3S*-(3α,5β,15α)]-3,4,5,6,14,15-hexahydro-15-(methyl acetate)-20-ethylidene-21-oxo-indolo[2,3-a]quinolizine-5-carboxylate | 236750-90-6 | C25H30N2O5 | 438.524 | 
                                                                                                                                            
                                        | —— | tert-butyl [3S*-(3α,5β,15α,20β)]-3,4,5,6,14,15,20-heptahydro-20-(1'S-1'-ethan-1'-ol)-15-(methyl acetate)-21-oxo-indolo[2,3-a]quinolizine-5-carboxylate | 236750-89-3 | C25H32N2O6 | 456.539 | 
                                                                                                                                            
                                        | —— | tert-butyl [3S*-(3α,5β,15α,20β)]-3,4,5,6,14,15,20-heptahydro-20-(ethan-1-one)-15-(methyl acetate)-21-oxo-indolo[2,3-a]quinolizine-5-carboxylate | 236750-88-2 | C25H30N2O6 | 454.523 | 
                                                                                                                                            
                                        | —— | tert-butyl [3S*-(3α,5β)]-3,4,5,6-tetrahydro-3-(methyl but-2'-enoate-4'-yl)-1H-pyrido[3,4-b]indole-5-carboxylate | 236750-87-1 | C21H26N2O4 | 370.448 | 
                                                                                                                                            
                                        | —— | [3S*-(3α,5β)]-3,4,5,6-tetrahydro-3-(methyl but-2'-enoate-4'-yl)-1H-pyrido[3,4-b]indole-5-carboxylic acid | 236750-86-0 | C17H18N2O4 | 314.341 |