3'-Guanylic acid, 5'-O-(bis(4-methoxyphenyl)phenylmethyl)-P-(4-chlorophenyl)thymidylyl-(3'.5')-2'-deoxy-N-(2-methyl-1-oxopropyl)-, 4-chlorophenyl 2-cyanoethyl ester 73591-24-9 EINECS 277-546-3