26182-58-1 26966-61-0 39288-01-2 39466-04-1 5'-Adenylic acid, thymidylyl-(5'-3')-2'-deoxy-, homopolymer 90385-82-3 9054-18-6 POLY DA-DT Poly(deoxyadenylate-thymidylate) Polydeoxyadenine nucleotides-polythymine nucleotides