二甲基胂酸

èr jiǎ jī shèn suān

dimethylarsenic acid (CH3)2AsO2H

cacodylic acid

èr

two

jiǎ

first of the ten Heavenly Stems 十天干[shi2 tian1 gan1]

(bound form) base; foundation

shèn

arsine

suān

sour