AIDS-166991 AIDS166991 N-(-)-cis-Myrtanyl-N'-(1S)-(1-ethylcyclohexyl)ethane-1,2-diamine N-[(1S)-1-Cyclohexylethyl]-N'-{[(1S,2R,5S)-6,6-dimethylbicyclo[3.1.1]hept-2-yl]methyl}ethane-1,2-diamine cis-(-)-Myrtanylamine analog