. 2014 Jan 30;164(3):1222–1236. doi: 10.1104/pp.113.228429

Table I. Abietane- and labdane-type diterpenoids detected by LC-MS analysis of oil bodies isolated from C. forskohlii root cork.

Compounds were identified based on accurate mass measurements with the exception of forskolin, which was also identified based on coelution with an authentic standard.

Retention time	m/z	Adduct	Predicted Formula	Mass Accuracy	Compound	Reference
min				mg L⁻¹
6.69	331.1901	[M + H]⁺	C₂₀H₂₆O₄	0.87	14-deoxycoleon U	Xu et al., 2005
9.64	375.2159	[M + Na]⁺	C₂₀H₃₂O₅	−4.84	Deoxy-deacetyl-forskolin	Asada et al., 2012
9.67	433.2194	[M + Na]⁺	C₂₂H₃₄O₇	0.67	Forskolin	Bhat et al., 1977
10.88	401.2298	[M + Na]⁺	C₂₂H₃₄O₅	0.12	Dideoxy-forskolin	Asada et al., 2012
14.20	317.2102	[M + H]⁺	C₂₀H₂₈O₃	2.91	20-Deoxocarnosol	Kelecom, 1984
16.11	417.2252	[M + Na]⁺	C₂₂H₃₄O₆	−1.12	Deoxy-forskolin	Asada et al., 2012
18.29	385.2341	[M + Na]⁺	C₂₂H₃₄O₄	2.16	Trideoxy-forskolin	Asada et al., 2012
22.95	323.1967	[M + Na]⁺	C₂₀H₂₈O₂	4.83	Barbatusol	Kelecom, 1983