(8R,9R)-8-(2-oxopropyl)-1,5-dithiaspiro[5.5]undecane-9-carbaldehyde

(4aR,4bS,8S,11aS,11bR,13aR)-8-methyldodecahydrospiro[benzo[f]pyrido[2,1-a]isoquinoline-2,2'-[1,3]dithiane]-6,12(1H,3H)-dione

(4aR,4bS,8S,11aS,11bS,13aR)-8-methyldodecahydrospiro[benzo[f]pyrido[2,1-a]isoquinoline-2,2'-[1,3]dithiane]-6,12(1H,3H)-dione

(4aR,4bR,5S,8S,11aS,13aR)-8-methyl-5-(2-methylallyl)-3,4,4a,4b,5,8,9,10,11,11a,13,13a-dodecahydrospiro[benzo[f]pyrido[2,1-a]isoquinoline-2,2'-[1,3]dithian]-6(1H)-one

(4aR,4bR,5R,8S,11aS,13aR)-8-methyl-5-(2-methylallyl)-3,4,4a,4b,5,8,9,10,11,11a,13,13a-dodecahydrospiro[benzo[f]pyrido[2,1-a]isoquinoline-2,2'-[1,3]dithian]-6(1H)-one