6.
[1]. Hiroki Serizawa, et al. Direct synthesis of pentafluoroethyl copper from pentafluoropropionate as an economical CF5 source: application to pentafluoroethylation of arylboronic acids and aryl bromides. Org Lett. 14 Jul ;16(1):456-9.
H5-H15-H19-H5
P1-P-P4-P41-P4-P4-P61-P64-P71-P8-P+P5-P4+P4-P6+P64-P7+P78-P45-P51
GHS,GHS7
7