Build Backbone:
KETO modification not allowed at ring start position. Select D or L configuration to indicate orientation of OH group at anomeric center.
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Set Ring Closure:
Start End
Quick changes:

Substituents:
Position: Name: Linkage Type:
Position: Name: Linkage Type:
Position: Name: Linkage Type:
Position: Name: Linkage Type:
Position: Name: Linkage Type:
Position: Name: Linkage Type: