Two new diterpenoid quinones, coleon S and T were isolated from the chloroform extract of the leaves of Coleus forskohlii, and based on spectroscopic data, their structures were identified as 1,4-phenathrenedione-4b,5,6,8a,9,10-hexahydro-3,9(,10(-trihydroxy-4b,7,8-rimethyl -2-(2-ethoxypropyl)(1) and 1,4-phenathrenedione-2,3,4b,5,6, 8a,9,10-octahydro-3,9(,10(- tri-hydroxy-4b,7,8-trimethyl-2-propylene(2), respectively.
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