[1]. Hung-Ming Yang, et al. Esterification of sodium 4-hydroxybenzoate by ultrasound-assisted solid-liquid phase-transfer catalysis using dual-site phase-transfer catalyst. Ultrason Sonochem. 214 Jan;21(1):95-4.
H14-H1
P26-P264-P2-P1+P+P1-P4+P4-P6-P45-P51
GHS5
261