C. (5R,5aR,8aR,9S)-9-[(4,6-O-(R)-ethyliden-α-D-glukopyranosyl)oxy]-5-(4-hydroxy-3,5-dimethoxyfenyl)-5,8,8a,9-tetrahydroisobenzofuro[5,6-f][1,3]benzodioxol-6(5aH)-on (α-etoposid),