537
In this study , we aimed to investigate whether chronic in vivo treatment of Crataegus microphylla ( CM ) extract in diabetic rats induced with streptozotocin ( STZ , intraperitoneal , 65 mg / kg ) preserves vascular function and to evaluate whether the reduction of inducible nitric oxide synthase ( iNOS ) , proinflammatory cytokines , and lipid peroxidation mediates its mechanisms of action .
 streptozotocin, STZ, nitric oxide
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 streptozotocin, STZ, nitric oxide