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139988-52-6

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139988-52-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139988-52-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,9,8 and 8 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 139988-52:
(8*1)+(7*3)+(6*9)+(5*9)+(4*8)+(3*8)+(2*5)+(1*2)=196
196 % 10 = 6
So 139988-52-6 is a valid CAS Registry Number.

139988-52-6Downstream Products

139988-52-6Relevant articles and documents

Pharmaceutically active benzoquinazoline compounds

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Example 34, (2010/11/29)

Compounds of formula (I) or salts thereof, wherein the dotted line represents a single or double bond, R1is alkyl or amino optionally substituted by alkyl, alkanoyl or benzyl group; R2, R3, R4and R5are the same or different and each is selected from hydrogen, phenyl, halo, nitro, a group S(O)nR8wherein n is the integer 0, 1 or 2 and R8is halo or alkyl or a group NR9R10wherein R9and R10are both hydrogen, a group NR11R12wherein R11and R12are the same or different and each is hydrogen or alkyl, a group OR13wherein R13is hydrogen or C1-4alkyl optionally substituted by halo; a C1-4aliphatic group optionally substituted by a group OR14or NR14R15wherein R14and R15are the same or different and each is hydrogen or alkyl; or two of R2to R5are linked together to form a benzo group, or one of R2to R5is a group -X-Y-R16wherein X is CH2, NR17, CO or S(O)m, and Y is CH2, NR17, O, or S(O)m, or -X-Y- is a group -O-, -NR17-, -CH=CH- or -N=N-, are disclosed as pharmacological agents useful in the treatment of tumours. Pharmaceutical compositions and methods for the preparation of compounds of formula (I) are also described.

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