Etoposide EP Impurity O

Chemical Name: (5R,5aR,8aR,9S)-9-[[2,3-bis-O-(dichloroacetyl)-4,6-O-[(1S)-ethane-1,1-diyl]-β-L-glucopyranosyl]oxy]-5-(4-hydroxy-3,5-dimethoxyphenyl)-5,8,8a,9-tetrahydro[2]benzofuro[5,6-f][1,3]benzodioxol-6(5aH)-one