Tetramethylpyrazine1124-11-440 % similar 4-Iodo-3,5-dimethylisoxazole10557-85-433 % similar 5-Amino-3,4-dimethylisoxazole19947-75-233 % similar 2,3-Dimethylpyrazine5910-89-433 % similar Ligustrazine hydrochloride76494-51-433 % similar Trimethyloxazole20662-84-430 % similar 2,1,3-Benzoxadiazole273-09-630 % similar