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. 2020 Oct 2;10:16438. doi: 10.1038/s41598-020-73442-0

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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(a). Phytoconstituents detected in the ethyl acetate extract from Amomum nilgiricum leaves using gas chromatography-mass spectrometry. (b). Chemical structure of six phytocompounds identified based on the retention time and peak area, namely (1) octadec-1-yne, (19.950 retention time and 2.852% peak area), (2) 3,4-heptadien-2-one, 3-cyclopentyl-6-methyl- (21.086 retention time and 3.027% peak area), (3) [3,12-diacetyloxy-10,14-dimethyl-13-oxo-15-(5-oxo-2H-furan-3-yl)-2-oxapentacyclo[9.7.0.01,3.05,10.014,18]octadecan-7-yl] acetate (21.891 retention time and 82.105% peak area), (4) trimethyl-[4-(2,4,4-trimethylpentan-2-yl)phenoxy]silane (27.098 retention time and 3.757% peak area), (5) trimethyl-(2-trimethylsilylphenyl)silane (27.718 retention time and 4.706% peak area) and (6) 3,5-bis(trimethylsilyl)cyclohepta-2,4,6-trien-1-one (27.783 retention time and 3.553% peak area).