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Skeletal formula of acefylline


  • Molecular FormulaC9H10N4O4
  • Average mass238.200 Da
(1,3-Dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl)acetic acid
1,2,3,6-Tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purine-7-acetic Acid
1,3-Dimethylxanthine-7-acetic acid
211-490-2 [EINECS]
652-37-9 [RN]
7H-Purine-7-acetic acid, 1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-
CAS Registry Number: 652-37-9
CAS Name: 1,2,3,6-Tetrahydro-1,3-dimethyl-2,6-dioxopurine-7-acetic acid
Additional Names: carboxymethyltheophylline; 7-theophyllineacetic acid
Molecular Formula: C9H10N4O4
Molecular Weight: 238.20
Percent Composition: C 45.38%, H 4.23%, N 23.52%, O 26.87%
Literature References: Prepn: DE 352980 (1922 to E. Merck); Frdl. 14, 1320; S. M. Ride et al., Pharmazie 32, 672 (1977). Prepn of salts: J. Baisse, Bull. Soc. Chim. Fr. 1949, 769; M. Milletti, F. Virgili, Chimica 6, 394 (1951), C.A. 46, 8615h (1952). GC determn in urine: J. Zuidema, H. Hilbers, J. Chromatogr. 182, 445 (1980). HPLC determn in serum and pharmacokinetics: S. Sved et al.,Biopharm. Drug Dispos. 2, 177 (1981).
Properties: Crystals from water, mp 271°.
Melting point: mp 271°
Derivative Type: Sodium salt
CAS Registry Number: 837-27-4
Molecular Formula: C9H9N4NaO4
Molecular Weight: 260.18
Percent Composition: C 41.55%, H 3.49%, N 21.53%, Na 8.84%, O 24.60%
Properties: Silky needles, mp >300°.
Melting point: mp >300°
Derivative Type: Compd with piperazine
Additional Names: Acefylline piperazine; acepifylline
Trademarks: Dynaphylline (Welcker-Lyster); Etaphylline (Delalande); Etafillina (Delalande)
Properties: Undefined mixture of the 1:1 and 2:1 salts; contains 75-78% theophylline acetic acid and 22-25% anhydrous piperazine.
Therap-Cat: Bronchodilator.
Keywords: Bronchodilator; Xanthine Derivatives.

Acefylline (INN),[1] also known as acetyloxytheophylline, is a stimulant drug of the xanthine chemical class. It acts as an adenosine receptor antagonist. It is combined with diphenhydramine in the pharmaceutical preparation etanautine to help offset diphenhydramine induced drowsiness.[2]


DE 352980 (1922 to E. Merck); Frdl. 14, 1320; S. M. Ride et al., Pharmazie 32, 672 (1977).

File:Acefylline synthesis.svg


  • Use:cardiotonic, diuretic, antispasmodic, bronchodilator
  • Chemical name:1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purine-7-acetic acid
  • Formula:C9H10N4O4
  • MW:238.20 g/mol
  • CAS-RN:652-37-9
  • EINECS:211-490-2
  • LD50:1180 mg/kg (M, i.p.); 2733 mg/kg (M, p.o.)
  • Use:
  • Chemical name:1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purine-7-acetic acid compd. with piperazine
  • Formula:C9H10N4O4 • xC4H10N2
  • MW:unspecified
  • CAS-RN:18833-13-1
  • EINECS:242-614-3
Acefylline heptaminol
  • Use:
  • Chemical name:1,2,3,6-tetrahydro-1,3-dimethyl-2,6-dioxo-7H-purine-7-acetic acid compd. with 6-amino-2-methyl-2-heptaminol (1:1)
  • Formula:C9H10N4O3 • C8H19NO
  • MW:367.45 g/mol
  • CAS-RN:59989-20-7
  • EINECS:262-012-4
  1. ^ “International Nonproprietary Names for Pharmaceutical Substances (INN). Recommended International Nonproprietary Names (Rec. INN): List 21” (PDF). World Health Organization. Retrieved 29 December 2016.
  2. ^ Zuidema, Jan. (1978). “Biofarmaceutische en farmacokinetische aspecten van theofylline en acefylline”. Thesis (doctoral)–Universiteit van Amsterdam. References
Baisse, J.: Bull. Soc. Chim. Fr. (BSCFAS) 1949, 769.
DE 352 980 (E. Merck; 1922).
Skeletal formula of acefylline
Ball-and-stick model of the acefylline molecule
Clinical data
ATC code
CAS Number
ECHA InfoCard 100.010.447 Edit this at Wikidata
Chemical and physical data
Formula C9H10N4O4
Molar mass 238.20 g/mol g·mol−1
3D model (JSmol)


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DR ANTHONY MELVIN CRASTO, Born in Mumbai in 1964 and graduated from Mumbai University, Completed his Ph.D from ICT, 1991,Matunga, Mumbai, India, in Organic Chemistry, The thesis topic was Synthesis of Novel Pyrethroid Analogues, Currently he is working with AFRICURE PHARMA, ROW2TECH, NIPER-G, Department of Pharmaceuticals, Ministry of Chemicals and Fertilizers, Govt. of India as ADVISOR, earlier assignment was with GLENMARK LIFE SCIENCES LTD, as CONSUlTANT, Retired from GLENMARK in Jan2022 Research Centre as Principal Scientist, Process Research (bulk actives) at Mahape, Navi Mumbai, India. Total Industry exp 32 plus yrs, Prior to joining Glenmark, he has worked with major multinationals like Hoechst Marion Roussel, now Sanofi, Searle India Ltd, now RPG lifesciences, etc. He has worked with notable scientists like Dr K Nagarajan, Dr Ralph Stapel, Prof S Seshadri, etc, He did custom synthesis for major multinationals in his career like BASF, Novartis, Sanofi, etc., He has worked in Discovery, Natural products, Bulk drugs, Generics, Intermediates, Fine chemicals, Neutraceuticals, GMP, Scaleups, etc, he is now helping millions, has 9 million plus hits on Google on all Organic chemistry websites. His friends call him Open superstar worlddrugtracker. His New Drug Approvals, Green Chemistry International, All about drugs, Eurekamoments, Organic spectroscopy international, etc in organic chemistry are some most read blogs He has hands on experience in initiation and developing novel routes for drug molecules and implementation them on commercial scale over a 32 PLUS year tenure till date Feb 2023, Around 35 plus products in his career. He has good knowledge of IPM, GMP, Regulatory aspects, he has several International patents published worldwide . He has good proficiency in Technology transfer, Spectroscopy, Stereochemistry, Synthesis, Polymorphism etc., He suffered a paralytic stroke/ Acute Transverse mylitis in Dec 2007 and is 90 %Paralysed, He is bound to a wheelchair, this seems to have injected feul in him to help chemists all around the world, he is more active than before and is pushing boundaries, He has 100 million plus hits on Google, 2.5 lakh plus connections on all networking sites, 100 Lakh plus views on dozen plus blogs, 227 countries, 7 continents, He makes himself available to all, contact him on +91 9323115463, email, Twitter, @amcrasto , He lives and will die for his family, 90% paralysis cannot kill his soul., Notably he has 38 lakh plus views on New Drug Approvals Blog in 227 countries...... , He appreciates the help he gets from one and all, Friends, Family, Glenmark, Readers, Wellwishers, Doctors, Drug authorities, His Contacts, Physiotherapist, etc He has total of 32 International and Indian awards

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