Figure 1.

Structure of cabazitaxel,11 a semi-synthetic taxane anticancer drug. (2α, 5β, 7β, 10β, 13α)-4-acetoxy-13-({(2R,3S)-3 [(tertbutoxycarbonyl) amino]-2-hydroxy-3-phenylpropanoyl}oxy)-1-hydroxy-7,10-dimethoxy-9-oxo-5,20-epoxytax11-en-2-yl benzoat•propan-2-one(1:1); C₄₅H₅₇NO₁₄•C₃H₆O; molecular mass = 894.01 units. The red circles highlight the methoxy side chains that represent the primary substitution for the hydroxyl groups found in docetaxel.