label: sinapoylglucose-sinapoylglucose O-sinapoyltransferase activity
label_lc: sinapoylglucose-sinapoylglucose o-sinapoyltransferase activity
description: "Catalysis of the reaction: 2 1-O-sinapoyl-beta-D-glucose = 1,2-di-O-sinapoyl-beta-D-glucose + D-glucose."