èr jiǎ jī shèn suān
dimethylarsenic acid (CH3)2AsO2H
cacodylic acid
二
èr
two
甲
jiǎ
first of the ten Heavenly Stems 十天干[shi2 tian1 gan1]
基
jī
(bound form) base; foundation
胂
shèn
arsine
酸
suān
sour
