Four new corynanthe-type alkaloids from the roots of Alstonia scholaris

Four new corynanthe-type alkaloids from the roots of Alstonia scholaris Meloslines A and B, two novel indole alkaloids from Alstonia scholaris New phenylpropanoids and monoterpene alkaloids with vasorelaxant activities from the branches of Alstonia scholaris Alstolarines A and B, two unusual monoterpenoid indole alkaloids with an acetal moiety from Alstonia scholaris Structurally diverse monoterpene indole alkaloids with vasorelaxant activities from the branches of Alstonia scholaris Alscholarines A and B, two rearranged monoterpene indole alkaloids from Alstonia scholaris Alscholarines A and B, two rearranged monoterpene indole alkaloids from Alstonia scholaris Alstiphyllanines I–O, ajmaline type alkaloids from Alstonia macrophylla showing vasorelaxant activity Alstoscholactine and Alstolaxepine, Monoterpenoid Indole Alkaloids with γ-Lactone-Bridged Cycloheptane and Oxepane Moieties from Alstonia scholaris Alstilobanines A–E, new indole alkaloids from Alstonia angustiloba