(+/-)-3,5-Dioxa-9-aza-4-phosphaheptacosan-1-aminium,7-ethoxy-4-hydroxy-N,N,N-trimethyl-10-oxo-,hydroxide,inner salt,4-oxide 112989-02-3 AIDS-000606 AIDS000606 AM-18-OEt CP-51 NSC624874 Phosphoether lipid analog