10.1021/ol049444g.s001 Jun Wu Jun Wu Qiang Xiao Qiang Xiao Jianshe Huang Jianshe Huang Zhihui Xiao Zhihui Xiao Shuhua Qi Shuhua Qi Qingxin Li Qingxin Li Si Zhang Si Zhang Xyloccensins O and P, Unique 8,9,30-Phragmalin Ortho Esters from <i>Xylocarpus </i><i>g</i><i>ranatum</i> American Chemical Society 2004 ortho ester Xyloccensins O mangrove plant Xylocarpus granatum xyloccensins O Xylocarpus g ranatum biogenetic pathway phragmalin 2004-05-27 00:00:00 Journal contribution https://acs.figshare.com/articles/journal_contribution/Xyloccensins_O_and_P_Unique_8_9_30_Phragmalin_Ortho_Esters_from_i_Xylocarpus_i_i_g_i_i_ranatum_i_/3338119 Two unique 8,9,30-phragmalin ortho esters, xyloccensins O (<b>1</b>) and P (<b>2</b>), were isolated from the mangrove plant <i>Xylocarpus granatum</i>. They are a new type of ortho ester of phragmalin. The structures were determined by spectroscopic and single-crystal X-ray diffraction techniques. The biogenetic pathway to these new phragmalins was also proposed.