AIDS-013882 AIDS013882 Butanedioic acid, 2,2-dimethyl-, 4-[(3.beta.)-28-hydroxy-28-oxolup-20(30)-en-3-yl] ester & 5-Cyclopropyl-9-methyl-5,10-dihydro-4,5,6,10-tetraaza-dibenzo[a, d]cyclohepten-11-one PA-457 & Nevirapine