Metabolic stimulation-elicited transcriptional responses and biosynthesis of acylated triterpenoids precursors in the medicinal plant Helicteres angustifolia

Table 1 Main triterpenoids in H. angustifolia

Parent nucleus	R₁	R₂	R₃	Compound name
A	OH	CH₃	COOH	betulonic acid
	OCOCH₃	CH₂OCOBz	COOCH₃	helicteric acid methyl ester
	OCOCH₃	CH₂OCO(4-OH)-Bz	COOCH₃	27-(p-hydroxyl) benzoylhelicteric acid methyl ester
	OCOCH₃	CH₂OCOBz	COOH	helicteric acid
	OCOCH₃	CH₃	OH	betulin-3-acetate
	OCOCH₃	CH₃	COOH	betulonicacid-3-acetate
	OH	CH₂OCOBz	COOH	27-benzoybetulinic acid
	OH	CH₂OCOBz	COOCH₃	27-benzoybetulinic acid methyl ester
B	OH	CH₃	COOH	oleanic acid
	OCOCH₃	CH₂OCOBz	COOH	helicterilic acid
	OCOCH₃	CH₂OCOBz	COOCH₃	helicterilic acid methyl ester
	OH	CH₂OCOBz	COOCH₃	3β-hydroxyphenyl-27-benzoyoleanic acid
	OCOCHCH(4-OH)Bz	CH₃	COOH	3-o-p-coumaroyloleanolic acid
	OCOCH₃	CH₂OCO(4-OH)Bz	COOCH₃	27-(p-hydroxyl) benzoylhelicteric acid methyl ester

A and B correspond to parent nucleus of lupane type and the oleanane type, respectively

ISSN: 1471-2229