Abstract
Two novel royleanones, bungone A (1) and B (2) have been isolated from the stem of Clerodendrum bungei. The structures of these two compounds [9, 10-dihydro-3, 4, 9-trimethyl phenanthro[3, 2-b]pyran (7H)-7, 12(8H)-dione (bungone A) and 9, 10-dihydro-8-hydroxymethyl-3, 4, 9-trimethyl phenanthro[3, 2-b]pyran (2H)-7, 12-dione (bungone B)] were determined mainly on the spectral analysis.
