WordNet

arrange into a group or groups; "Can you group these shapes together?"
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule (同)radical, chemical group
any number of entities (members) considered as a unit (同)grouping
a set that is closed, associative, has an identity element and every element has an inverse (同)mathematical group
form a group or group together (同)aggroup
the activity of putting things together in groups
a system for classifying things into groups (同)pigeonholing
a support placed beneath or against something to keep it from shaking or falling
the monovalent organic group C3H7- obtained from propane (同)propyl_group, propyl radical
arranged into groups (同)sorted

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(…の)『群れ』,集まり,小集団《+of+名》 / (主義・系統・種類などを同じくする人・物の)『派』,『団体』 / (ポミュラーソング歌手の)グループ / (動・植物分類上の)群;(化学の)基,原子団;(地質学上の)界;(数学の)群;(言語学上の)語派 / …‘を'一群に集める,一団にする《+『名』+『together』》 / (系統的に)…‘を'分類する,調和よく配合する《+『名』+『together』》 / 集まる,群(集団)をなす
グループに分けること;分類法 / (集まった物の)配置,配合
支柱,支え / 支えとなる人(物) / …‘を'支える / (…に)…‘を'寄りかからせる《+『名』+『against』+『名』》
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出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2019/07/10 22:06:23」(JST)

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From left to right: the two isomeric groups propyl and 1-methylethyl (iPr or isopropyl), and the non-isomeric cyclopropyl group.

In organic chemistry, propyl is a three-carbon alkyl substituent with chemical formula –CH
₂CH
₂CH
₃ for the linear form. This substituent form is obtained by removing one hydrogen atom attached to the terminal carbon of propane. ^[1] A propyl substituent is often represented in organic chemistry with the symbol Pr (not to be confused with the element praseodymium).

An isomeric form of propyl is obtained by moving the point of attachment from a terminal carbon atom to the central carbon atom, named 1-methylethyl or isopropyl. To maintain four substituents on each carbon atom, one hydrogen atom has to be moved from the middle carbon atom to the carbon atom which served as attachment point in the n-propyl variant, written as –CH(CH
₃)₂.^[2]

Linear propyl is sometimes termed normal and hence written with a prefix n- (i.e., n-propyl), as the absence of the prefix n- does not indicate which attachment point is chosen, i.e. absence of prefix does not automatically exclude the possibility of it being the branched version (i.e. i-propyl or isopropyl).^[3]

In addition, there is a third, cyclic, form called cyclopropyl, or c-propyl. It is not isomeric with the other two forms, having the chemical formula -C₃H₅.

Examples

n-Propyl acetate is an ester which has the n-propyl group attached to the oxygen atom of the acetate group.

Chemical structure of propyl acetate.

Other examples

Isopropyl alcohol

References

^ IUPAC Nomenclature - Acyclic Hydrocarbons Rule A-1.
^ IUPAC Nomenclature - Acyclic Hydrocarbons Rule A-2.
^ IUPAC Nomenclature - Acyclic Hydrocarbons Rule A-1.

UpToDate Contents

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English Journal

In vivo oestrogenic modulation of Egr1 and Pitx1 gene expression in female rat pituitary gland.

Gajewska A1, Herman AP2, Wolińska-Witort E2, Kochman K2, Zwierzchowski L2.
Journal of molecular endocrinology.J Mol Endocrinol.2014 Dec;53(3):355-66. doi: 10.1530/JME-14-0092. Epub 2014 Sep 25.
EGR1 and PITX1 are transcription factors required for gonadotroph cell Lhb promoter activation. To determine changes in Egr1 and Pitx1 mRNA levels in central and peripheral pituitary stimulations, an in vivo model based on i.c.v. pulsatile (1 pulse/0.5 h over 2 h) GnRH agonist (1.5 nM busereli
PMID 25258388

Roles of Estrogen in the Formation of Intracranial Aneurysms in Ovariectomized Female Mice.

Tada Y1, Makino H, Furukawa H, Shimada K, Wada K, Liang EI, Murakami S, Kudo M, Kung DK, Hasan DM, Kitazato KT, Nagahiro S, Lawton MT, Hashimoto T.
Neurosurgery.Neurosurgery.2014 Dec;75(6):690-695.
BACKGROUND:: Epidemiological studies have indicated that postmenopausal women have a higher incidence of intracranial aneurysms than men in the same age group.OBJECTIVE:: To investigate whether estrogen or estrogen receptors (ERs) mediate protective effects against the formation of intracranial aneu
PMID 25181430

A multiresidue method for the determination of selected endocrine disrupting chemicals in human breast milk based on a simple extraction procedure.

Rodríguez-Gómez R1, Jiménez-Díaz I1, Zafra-Gómez A2, Ballesteros O1, Navalón A1.
Talanta.Talanta.2014 Dec;130:561-70. doi: 10.1016/j.talanta.2014.07.047. Epub 2014 Jul 26.
In recent decades, in parallel to industrial development, a large amount of new chemicals have emerged that are able to produce disorders in human endocrine system. These groups of substances, so-called endocrine disrupting chemicals (EDCs), include many families of compounds, such as parabens, benz
PMID 25159447

Japanese Journal

Ｊｏｕｒｎａｌ　ｏｆ　Ｔｏｘｉｃｏｌｏｇｉｃ　Ｐａｔｈｏｌｏｇｙ

Masubuchi Yasunori,Koyanagi Mihoko,Hayashi Shim-mo,Shibutani Makoto,Tanaka Takaharu,Okada Rena,Ito Yuko,Nakahara Junta,Kikuchi Satomi,Watanabe Yousuke,Yoshida Toshinori,Maronpot Robert R.
Ｊｏｕｒｎａｌ　ｏｆ　Ｔｏｘｉｃｏｌｏｇｉｃ　Ｐａｔｈｏｌｏｇｙ 32(3), 165-180, 2019
… Mated female Sprague Dawley rats were either untreated (control) or treated with 12 ppm 6-propyl-2-thiouracil (PTU), an anti-thyroid agent, in drinking water from gestational day 6 to postnatal day (PND) 21, the latter group being subjected to feeding basal diet alone or diet containing AGIQ at 5,000 ppm or ALA at 2,000 ppm during PTU exposure. …
NAID 130007682142

Journal of Health Science

Kim Seon Woong,Lee Taeho,Oh Yoon Sin,Shin Sang Mi,Lee Joo-Youn,Kim Sanghee,Baek Dong Jae,Park Eun-Young
ＣＨＥＭＩＣＡＬ　＆　ＰＨＡＲＭＡＣＥＵＴＩＣＡＬ　ＢＵＬＬＥＴＩＮ 67(6), 599-603, 2019
… In a recently reported study by Pfizer on the synthesis of PF-543 derivatives and the SK inhibitory effects, the introduction of propyl moiety into sulfonyl group of PF-543 in the case of <b>26b</b> …
NAID 130007657410

Tris (1,3-dichloro-2-propyl) phosphate treatment induces DNA damage, cell cycle arrest and apoptosis in murine RAW264.7 macrophages

Zhang Wei,Wang Ruiguo,Giesy John P.,Li Yang,Wang Peilong
Ｔｈｅ　Ｊｏｕｒｎａｌ　ｏｆ　Ｔｏｘｉｃｏｌｏｇｉｃａｌ　Ｓｃｉｅｎｃｅｓ 44(3), 133-144, 2019
… <p>Tris (1,3-dichloro-2-propyl) phosphate (TDCPP) is the most widely used organophosphorus flame retardant, which is now used instead of polybrominated diphenyl ethers (PBDEs). … TDCPP increased the intracellular reactive oxygen species (ROS) level in RAW264.7 cells up to 1.44-fold compared to the control group at 12 hr. …
NAID 130007608297