CAS Number Index

A CAS Registry Number,also referred to as CASRN or CAS Number, is a unique numerical identifier assigned by the Chemical Abstracts Service (CAS) to every chemical substance described in the open scientific literature (currently including all substances described from 1957 through the present, plus some substances from the early or mid 1900s), including organic and inorganiccompounds, minerals, isotopes, alloys and nonstructurable materials (UVCBs, of unknown, variable composition, or biological origin).The registry maintained by CAS is an authoritative collection of disclosed chemical substance information. It currently identifies more than 144 million unique organic and inorganic substances and 67 million protein and DNA sequences,plus additional information about each substance. It is updated with around 15,000 additional new substances daily.（information coming from wikipedia.org)

Name CAS Number
N-(4-acetamidophenyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 942008-62-0
N-cyclopentyl-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 955781-04-1
N-[(4-fluorophenyl)methyl]-2-(4-methyl-7-oxo-1-phenylpyrazolo[3,4-d]pyridazin-6-yl)acetamide 941884-20-4
N-(benzo[d][1,3]dioxol-5-ylmethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 941972-75-4
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide 942008-65-3
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-phenethylacetamide 941884-22-6
N-(3,4-dimethoxyphenethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 941972-78-7
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(5-methylisoxazol-3-yl)acetamide 941915-01-1
ethyl 2-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate 955781-17-6
ethyl 2-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)propanamido)-5,6-dihydro-4H-cyclopenta[b]thiophene-3-carboxylate 955781-22-3
4-(2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamido)benzamide 942008-68-6
N,N-diethyl-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 955781-32-5
6-(3-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941884-24-8
4-methyl-1-phenyl-6-(3-(trifluoromethyl)benzyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941972-81-2
4-methyl-1-phenyl-6-(4-(trifluoromethyl)benzyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 942008-71-1
methyl 5-({4-methyl-7-oxo-1-phenyl-1H,6H,7H-pyrazolo[3,4-d]pyridazin-6-yl}methyl)furan-2-carboxylate 946203-82-3
6-(2-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941884-26-0
4-methyl-1-phenyl-6-(pyridin-3-ylmethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 955781-52-9
4-methyl-1-phenyl-6-(pyridin-2-ylmethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941915-05-5
methyl 2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetate 955781-55-2
2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetonitrile 955781-67-6
N-(tert-butyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 955781-76-7
N-(2-methoxyethyl)-2-(4-methyl-7-oxo-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 942008-74-4
6-(3,5-dimethoxybenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941915-07-7
6-(2-chloro-6-fluorobenzyl)-4-methyl-1-phenyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 942008-77-7
1-(3-chlorophenyl)-4-methyl-6-(2-(4-methylpiperidin-1-yl)-2-oxoethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 955800-14-3
1-(3-chlorophenyl)-4-methyl-6-(2-oxo-2-(4-phenylpiperazin-1-yl)ethyl)-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 955800-18-7
1-(3-chlorophenyl)-6-(2-(3,4-dihydroquinolin-1(2H)-yl)-2-oxoethyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 955800-29-0
1-(3-chlorophenyl)-6-(2-(indolin-1-yl)-2-oxoethyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 955800-32-5
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 955800-35-8
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(2-fluorophenyl)acetamide 941884-30-6
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(3-fluorophenyl)acetamide 941972-90-3
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(4-fluorophenyl)acetamide 941915-09-9
2-Benzofurancarboxamide, N-[5-[(2-fluorophenyl)methyl]-2-thiazolyl]-3-[(2-methylphenoxy)methyl]- 890597-39-4
N-(benzo[d][1,3]dioxol-5-yl)-2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)acetamide 942008-80-2
Dimethyl 2-(7-methyl-1-oxoisochroman-3-carboxamido)terephthalate 890600-51-8
7-methyl-1-oxo-N-(4-sulfamoylphenyl)-3,4-dihydro-1H-isochromene-3-carboxamide 879569-11-6
(Z)-2-(5-((5-(4-methoxyphenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid 883469-82-7
(Z)-2-(5-((5-(2-chlorophenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid 883474-70-2
(Z)-2-(5-((5-(4-chlorophenyl)furan-2-yl)methylene)-4-oxo-2-thioxothiazolidin-3-yl)propanoic acid 883474-96-2
(Z)-4-(4-oxo-2-thioxo-5-((5-(2-(trifluoromethyl)phenyl)furan-2-yl)methylene)thiazolidin-3-yl)butanoic acid 676643-69-9
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(4-fluorobenzyl)acetamide 941884-32-8
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(furan-2-ylmethyl)acetamide 941972-93-6
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-((tetrahydrofuran-2-yl)methyl)acetamide 941915-11-3
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(3,4-dimethoxyphenethyl)acetamide 955801-70-4
2-(1-(3-chlorophenyl)-4-methyl-7-oxo-1H-pyrazolo[3,4-d]pyridazin-6(7H)-yl)-N-(5-methylisoxazol-3-yl)acetamide 942008-83-5
N-[2-(ethylsulfanyl)phenyl]-2,3-dihydro-1,4-benzodioxine-2-carboxamide 890601-49-7
N-(4-iodo-2-methylphenyl)-2,3-dihydro-1,4-benzodioxine-2-carboxamide 890601-53-3
1-(3-chlorophenyl)-6-(3-fluorobenzyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941884-34-0
1-(3-chlorophenyl)-6-(4-fluorobenzyl)-4-methyl-1H-pyrazolo[3,4-d]pyridazin-7(6H)-one 941972-96-9

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