Development of a MD-LC-MS/MS Method to Analyze 3 Bioactive Compounds in Huoxuezhitong Rubber Patch and Application to a Pharmacokinetic Study in Rats

Table 6

Physical parameters of paeonol and eugenol.

	paeonol	eugenol	piperine
Structure
Molecular weight	166.18	164.20	285.34
melting point	48-50°C	−9.2°C-−9.1°C	131-135°C
Water solubility	349.8 μg/mL	insoluble	insoluble