21.7
[1]. N C Jain, et al. Simultaneous determination of cocaine and benzoyl ecgonine in urine by gas chromatography with on-column alkylation. J Forensic Sci. 177 Jan;22(1):7-16.
H226-H15-H1-H5
P21-P2-P24-P241-P242-P24-P261-P264-P271-P28-P2+P52-P4+P4-P62+P64-P7+P78-P45-P51
GHS2,GHS7
1