5,6-dimethoxy-4-oxo-4H-pyran-2-carboxylic acid methyl ester

N-dimethylphenylsilylmethyl-N-nitrosourea

苯基亚胂酸二甲酯

1-异丙基-4-甲氧基-4-哌啶醇

methylphosphonic acid dimethyl ester, deprotonated form