cis-3,4-Dihydroxy-1,1,2,2-tetramethyl-cyclobutan

tetrakis-(3,4-dimethoxy-phenyl)-ethane-1,2-diol

(3S,4S)-1,2,3,4-tetrahydronaphtho[1,2-b]phenanthrene-3,4-diol

tetramethyl cis-3,4-dipropylcyclobutane-1,1,2,2-tetracarboxylate

tetramethyl cis-3,4-diethylcyclobutane-1,1,2,2-tetracarboxylate

cis-3-[4-(1,1-Dimethylheptyl)-2-(phenylmethoxy)phenyl]-cyclohexanol

cis-1,1,2,2,3,4-hexafluorocyclobutane

Methyl 2'-amino-1-ethyl-7'-methyl-2,5'-dioxo-6'-((tetrahydrofuran-2-yl)methyl)-5',6'-dihydrospiro[indoline-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate

methyl 2-amino-11-(carbamoylmethyl)-7-methyl-5,12-dioxospiro[6-hydro-4H-pyrano [3,2-c]pyridine-4,3'-indoline]-3-carboxylate

methyl 2-amino-6,11-diethyl-7-methyl-5,12-dioxospiro[6-hydro-4H-pyrano[3,2-c]p yridine-4,3'-indoline]-3-carboxylate

(14aS,26aR)-2,3,13,14,14a,15,26,26a-Octahydro-22,30-dimethoxy-14-methyl-1H-4,6:16,19-dietheno-21,25-metheno-12H-[1,3]dioxolo[4,5-g]pyrido[2 inverted exclamation marka,3 inverted exclamation marka:17,18][1,10]dioxacycloeicosino[2,3,4-ij]isoquinoline

Ethyl 1-allyl-2'-amino-6',7'-dimethyl-2,5'-dioxo-5',6'-dihydrospiro[indoline-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate

methyl 2-amino-1'-[(4-chlorophenyl)methyl]-7-methyl-2',5-dioxospiro[6H-pyrano[3,2-c]pyridine-4,3'-indole]-3-carboxylate

methyl 2'-amino-6'-(furan-2-ylmethyl)-7'-methyl-2,5'-dioxospiro[1H-indole-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate

Methyl 2'-amino-7'-methyl-2,5'-dioxo-6'-(tetrahydrofuran-2-ylmethyl)-1,2,5',6'-tetrahydrospiro[indole-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate

Methyl 2'-amino-6'-ethyl-1,7'-dimethyl-2,5'-dioxo-1,2,5',6'-tetrahydrospiro[indole-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate

Ethyl 2'-amino-1-ethyl-6',7'-dimethyl-2,5'-dioxo-1,2,5',6'-tetrahydrospiro[indole-3,4'-pyrano[3,2-c]pyridine]-3'-carboxylate