Two new diterpenoid derivatives 7,12,17-triacetoxy-619-dihydroxy-13,16-spirocicloabiet-8-ene-11,14-dione ( 1: ) and 6-acetoxy-3,7,12-trihydroxy-13,16-spirocicloabiet-8-ene-11,14-dione ( 2: ) along with 11 ( 3: - 13: ) miscellaneous compounds were isolated from the leaves of Codd. Their structures were elucidated by spectroscopic analysis and gauge independent atomic orbitals C NMR calculations. The isolated compounds were screened for their effects on intestinal motility using guinea-pig ileum and duodenum and by their cytotoxicity against 4 human cancer cell lines (HCT-116, SF-295, PC-3, and HL-60). Compounds 6: and 9: were moderately cytotoxic against HL-60, whereas 6: and 13: were more active on SF-295 and HCT-116.
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