Compound 4

2R,3aS,5aR,5bS,9S,13S,14R,16aS,16bR)-2-(6-deoxy-2,3,4-tri-O-methyl-?-L-mannopyranosyloxy)-13-(4-dimethylamino-2,3,4,6-tetradeoxy-?-D-erythropyranosyloxy)-9-ethyl-2,3,3a,5a,5b,6,7,9,10,11,12,13,14,15,16a,16b-hexadecahydro-14-methyl-1H-as-indaceno[3,2-d]oxacyclododecine-7,15-dione

From: A new family of ATP-dependent oligomerization-macrocyclization biocatalysts