Detailed Instructions: In this task, you're given a paragraph and title from the research paper. Your task is to classify whether the given title is suitable or not for the research paper based on the given paragraph. Return "True" if title is proper according to paragraph else "False".
Q: Paragraph: To study the influence of a linker rigidity and donor-acceptor properties, the P-CH 2 -O-CHR-fragment in acyclic nucleoside phosphonates (e.g., acyclovir, tenofovir) was replaced by the P-CH 2 -HN-C(O)-residue. The respective phosphonates were synthesized in good yields by coupling the straight chain of x-aminophosphonates and nucleobase-derived acetic acids with EDC. Based on the 1 H and 13 C NMR data, the unrestricted rotation within the methylene and 1,2-ethylidene linkers in phosphonates from series a and b was confirmed. For phosphonates containing 1,3-propylidene (series c) fragments, antiperiplanar disposition of the bulky O,O-diethylphosphonate and substituted amidomethyl groups was established. The synthesized ANPs P-X-HNC(O)-CH 2 B (X = CH 2 , CH 2 CH 2 , CH 2-CH 2 CH 2 , CH 2 OCH 2 CH 2 ) appeared inactive in antiviral assays against a wide variety of DNA and RNA viruses at concentrations up to 100 lM while marginal antiproliferative activity (L1210 cells, IC 50 = 89 16 lM and HeLa cells, IC 50 = 194 19 lM) was noticed for the analog derived from (5-fluorouracyl-1-yl)acetic acid and O,O-diethyl (2-aminoethoxy)methylphosphonate. O H N X (EtO) 2 (O)P X = CH 2 , CH 2 CH 2 , CH 2 CH 2 CH 2 , CH 2 OCH 2 CH 2 B = natural or modified nuclebases
Title: Acyclic nucleoside phosphonates containing the amide bond
A:
True