8.8
[1]. Griffiths AJF, et al. An Introduction to Genetic Analysis. 7th edition. New York: W. H. Freeman; . Structure of DNA.
[]. ORO J, et al. Synthesis of purines under possible primitive earth conditions. I. Adenine from hydrogen cyanide. Arch Biochem Biophys. 1961 Aug;9:17-7.
[3]. Reader V. The assay of vitamin B(). Biochem J. 193;(6):187-31.
H3-H315-H319-H335
P61-P6-P7-P71-P8-P3+P35-P3+P3-P35+P351+P338-P33-P36+P36-P3+P33-P5-P51
GHS7