4,4-Bis(3-chloro-4-methoxy-5-(methoxycarbonyl)phenyl)-3-butenyl 5-hydroxy-10-oxo-1,2-bis(stearoyloxy)-4,6-dioxa-9-aza-5-phosphatridecan-13-oate 5-oxide AIDS-145022 AIDS145022 NSC668854