Pyran Carbonyl
(-)-7,7-Dimethoxy-3-(methoxycarbonylmethyl)-3-(2-oxopropyl)-9,9,10,10-tetrahydroxy-3,3,4,4-tetrahydro-8,8-bi[1H-naphtho[2,3-c]pyran]-1,1-dione
(1aS)-1aα,2a,4aβ,4bβ,6,8,9b,9cα-Octahydro-2β-hydroxy-2aβ,9bα-dimethyl-6β-[1-(methoxycarbonyl)ethyl]-2H,3H-furo[2,3,4:4,5]oxireno[7,8]naphtho[2,1-c]pyran-3,8-dione
(1S)-1α-[[(1,3-Benzodioxol-5-yl)carbonyl]oxy]-10α-acetoxy-2β-methoxy-3α,11aβ,11cβ-trimethyl-1,2,3,3aβ,6aβ,7,7aα,9,10,11a,11b,11c-dodecahydrophenanthro[10,1-bc]pyran-5,11(4H,8H)-dione
(1S,3S)-3-acetyl-3,5,12-trihydroxy-10-methoxy-6,11-dioxo-1,2,3,4,6,11-hexahydrotetracen-1-yl 2,3,6-trideoxy-3-[(pyridin-4-ylcarbonyl)amino]hexopyranoside
(1S,3S,4S,4aS,6aS,7Z,10S,11E,12aR,13S,20aS,20bR)-15-formyl-13,18-dihydroxy-1,3,7,11,20a-pentamethyl-20,21-dioxo-10-({2,3,4,6-tetradeoxy-4-[(methoxycarbonyl)amino]-3-methyl-3-nitro-beta-D-xylo-hexopyranosyl}oxy)-1,2,3,4,4a,6a,9,10,12a,13,14,20,20a,20b-tetr
(1S,3S,4S,4aS,6aS,7Z,10S,11E,12aR,13S,20aS,20bR)-15-formyl-13,18-dihydroxy-1,3,7,11,20a-pentamethyl-20,21-dioxo-10-({2,3,4,6-tetradeoxy-4-[(methoxycarbonyl)amino]-3-methyl-3-nitro-beta-D-xylo-hexopyranosyl}oxy)-1,2,3,4,4a,6a,9,10,12a,13,14,20,20a,20b-tetr