165456-81-5 Combivir Lamivudine/Zidovudine Mixture of Lamivudine and Zidovudine Thymidine, 3'-azido-3'-deoxy-, mixt. with 4-amino-1-((2R,5S)-2-(hydroxymethyl)-1,3-oxathiolan-5-yl)-2(1H)-pyrimidinone