Rivularine

7-Angeloylheliotridine

7-O-Angelylheliotridine

O7-Angeloylheliotridine

Angelic acid 7-ester with heliotridine

(Z)-2-Methyl-2-butenoic acid (1S)-2,3,5,7aβ-tetrahydro-7-hydroxymethyl-1H-pyrrolizin-1β-yl ester