1-(3-(Ethylamino)-2-pyridyl)-4-((5-methoxyindol-2-yl)carbonyl)piperazine monomethanesulfonate 138540-32-6 Atevirdine mesylate [USAN] DRG-0144 Piperazine, 1-(3-(ethylamino)-2-pyridinyl)-4-((5-methoxy-1H-indol-2-yl)carbonyl)-, monomethanesulfonate U-87201E [AmFAR Tx Dir 1993;6(4)] (Atevirdine mesylate) U87201E