Etoposide EP Impurity R

Chemical Name: (5R,5aR,8aR,9S)-9-[[4,6-O-[(1R)-ethane-1,1-diyl]-b-D-glucopyranosyl]oxy]-5-[4-[[(5R,5aR,8aR,9R)-5-(4-hydroxy-3,5-dimethoxyphenyl)-6-oxo-5,5a,6,8,8a,9-hexahydro[2]benzofuro[5,6-f][1,3]benzodioxol-9-yl]oxy]-3,5-dimethoxyphenyl]-5,8,8a,9-tetrahydro[2]benzofuro[5,6-f][1,3]benzodioxol-6(5aH)-one.