TY  - RPRT
TI  - Challenging artificial genetic systems: thymidine analogs with 5-position sulfur functionality.
AU  - Heike A Held
AU  - Steven A Benner
PY  - 2002
DO  - 10.1093/nar/gkf500
UR  - https://pubmed.ncbi.nlm.nih.gov/12202771/
ID  - 12202771
ER  -