Addition/Correction pubs.acs.org/JAFC
Correction to A Survey of Tremtone, Dehydrotremetone, and Structurally Related Compounds in Isocoma spp. (Goldenbush) in the Southwestern United States Stephen T. Lee,* Daniel Cook, T. Zane Davis, Dale R. Gardner, Robert L. Johnson, and Clinton A. Stonecipher J. Agric. Food Chem. 2015, 63 (3), 872−879. DOI: 10.1021/jf505423h
S
everal of the values contained in the original version of Table 2 are incorrect due to a calculation error, and are corrected in the revised table by multiplying the previously published values by 8. Tremetone, 1, and 7-isopentenyloxycoumarin, 5, from the Red Rock, Mesa, Kingman, and Wickenburg Sites and 3-oxyangeloyltremetone, 3, from the Tuba City Site have been corrected in the revised table and are greater by a factor of 8. The corrected table appears below. Table 2. Concentrations of Tremetone, 1, Dehydrotremetone, 2, 3-Oxyangeloyltremetone, 3, 4-Hydroxy-3-(3-methyl-2butenyl)acetophenone, 4, and 7-Isopentenyloxycoumarin, 5, in Isocoma spp. Field Collectionsa av compd concentrationb ± SD (n = 10), μg/mg dry weight Isocoma spp./site I. plurif lora Pecos Carlsbad I. tenuisecta Tuscon Red Rock I. azteca Newcomb Tsaya I. acradenia Mesa Kingman Wickenburg I. rusbyi Marble Canyon Tuba City Holbrook a
1
2
3
4
5
0.4 ± 0.3 0.16 ± 0.09
2.6 ± 0.7 0.8 ± 0.2
4±1 1.9 ± 0.7
0.2 ± 0.1 0.9 ± 0.6
1.7 ± 0.5 0.7 ± 0.5
2±1 1.3 ± 0.9
0.4 ± 0.4 0.09 ± 0.1
1.1 ± 0.4 0.8 ± 0.4
6±2 8±2
0.8 ± 1 0.0004 ± 0.001
2±3 0.5 ± 0.3
0.7 ± 0.4 0.8 ± 0.4
8±1 3±2 9±3
1.0 ± 0.4 4±2 1.1 ± 0.5
1.1 ± 0.9 4±2 1.2 ± 0.7
0.4 ± 0.4 1±1 0.6 ± 0.4
0.8 ± 0.3 0.8 ± 0.1 0.7 ± 0.2
0.7 ± 0.6 2±1 2±1
0.6 ± 0.6
4±1 4±1 7±4
0.07 ± 0.03 0.02 ± 0.02 0.13 ± 0.07
0.4 ± 0.3 0.07 ± 0.1
2±2
n = 10 for all sites except Pecos, Carlsbad, and Marble Canyon, where n = 9. bThe concentrations in italics are expressed in tremetone equivalents.
Published: February 20, 2015 © 2015 American Chemical Society
2365
DOI: 10.1021/acs.jafc.5b00819 J. Agric. Food Chem. 2015, 63, 2365−2365
