3-(2-(tert-butyldimethylsilyloxy)ethyl)indoline

[(1S,2R,3R),3ξ]-1-[4-(n-butyl)-1,3-dihydroxy-2,5-dimethyl-2-(4-cyclopentenyl)methyl]-3-(2-triethylsiloxyethyl)indoline

[(1S,2R,3R),3ξ]-1-[4-(n-butyl)-1,3-bis(tert-butyldimethylsiloxy)-2,5-dimethyl-2-(4-cyclopentenyl)methyl]-3-[2-(tert-butyldimethylsiloxy)ethyl]indoline