New naphthoquinone and monoterpenoid from Plumbago zeylanica
Susumu Ohira, Yoshiaki Yokogawa, Shinji Tsuji, Taichi Mitsui, Tatsuhiko Fukukawa, Ken-ichiro Hayashi, Atsuhito Kuboki, Nobuyasu Matsuura, Munekazu Iinuma, Hiroshi Nozaki
Tetrahedron Letters
55
48
6554
6556