5-(4-Chlorophenyl)-6-ethyl-2,4-pyrimidinediamine & [4s-(4.alpha.,4a.alpha.,5.alpha.,5a.alpha.,6. alpha.,12a.alpha.)]-4-(Dimethylamino)-1,4,4a,5, 5a,6,11,12a-octahydro-3,5,10,12,12a-pentahydroxy- 6- AIDS-008428 AIDS008428 Pyrimethamine & Doxycycline