1-Oxa-6-azaspiro[4.5]decane-6-carboxylic acid, 2-[(2S,4R)-6-[(3S,4S,6R,8S)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-...

1-Oxa-6-azaspiro[4.5]decane-6-carboxylic acid, 2-[(2S,4R)-6-[(3S,4S,6R,8S)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-4-carboxy-1-butenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-me...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-4-carboxy-1-butenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-me...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyl-6′′-[(1E)-5-oxo-1-pentenyl]dispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-methy...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyl-6′′-[(1E)-5-oxo-1-pentenyl]dispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-methy...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6′′-[(1E)-5-hydroxy-1-pentenyl]-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-m...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6′′-[(1E)-5-hydroxy-1-pentenyl]-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-m...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-8-hydroxy-4,...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-8-hydroxy-4,...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-8-hydroxy-4,...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-8-hydroxy-4,...

1-Oxa-6-azaspiro[4.5]decane-6-carboxylic acid, 2-[(2S,4S)-6-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-8-hydroxy-4,6-dimethyl-2-met...

1-Oxa-6-azaspiro[4.5]decane-6-carboxylic acid, 2-[(2S,4R)-6-[(3S,4S,6R,8R)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-8-hydroxy-4,6-dimethyl-2-met...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8S)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyl-6′′-[(1E)-5-oxo-1-pentenyl]dispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-methy...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8S)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyl-6′′-[(1E)-5-oxo-1-pentenyl]dispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-methy...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8S)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6′′-[(1E)-5-hydroxy-1-pentenyl]-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-m...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8S)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6′′-[(1E)-5-hydroxy-1-pentenyl]-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl-2-m...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8S)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl...

Spiro[5,9-epoxy-2H-furo[3,2-b]oxocin-2,2′-piperidine]-1′-carboxylic acid, 5-[(3S,4S,6R,8S)-3-(acetyloxy)-8-[(2R,2′R,2′′R,3aS,6S,6′′S,7aS)-6′′-[(1E)-5-(acetyloxy)-1-pentenyl]-2,3,3′,3a,4′,5′′,6,6′′,7,7a-decahydro-6-methyldispiro[5H-furo[3,2-b]pyran-5,2′(5′H)-furan-5′,2′′-[2H]pyran]-2-yl]-4,6-dimethyl...