File Name : fig s1.tif Caption : sclareol did not affect osteoblastic differentiation and mineralization in vitro. (a) representative images of alp staining of primary osteoblasts in different groups (day 7). alp-positive cells were stained blue. (b) representative images of alizarin red staining in different groups (day 21). the calcium nodules produced by osteoblasts were stained red.