Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'DMH1'?

A. A member of the class of quinolines that is quinoline which is substituted at positions 2 and 3 by methyl groups and at positions 4, 6, and 8 by acetoxy, tert-butyl, and fluorine, respectively. A fungicide developed mainly for the control of rice blast (Magnaporthe grisea), it has also been found to be effective against fungal diseases in soya beans and tomatoes.
B. A member of the class of indanones that is 5,6-dimethoxyindan-1-one which is substituted at position 2 by an (N-benzylpiperidin-4-yl)methyl group.
C. A polyketide antibiotic that is isolated from Actinosynnema pretiosum and also exhibits antitumour activity.
D. A pyrazolopyrimidine that is pyrazolo[1,5-a]pyrimidine bearing quinolin-4-yl and 4-isopropyloxyphenyl substituents at positions 3 and 6 respectively.

Answer: A pyrazolopyrimidine that is pyrazolo[1,5-a]pyrimidine bearing quinolin-4-yl and 4-isopropyloxyphenyl substituents at positions 3 and 6 respectively.