12. QUINONES: STRUCTURE AND DISTRIBUTION
671
Naphthacenequinones
e -Pyrromycinone
(Rutilantinone)
77 -Pyrromycinone
(CXXDC)
ζ- Pyrromycinone
(CXXVIII)
Me0 2 C
H 2 C
/C ^0
I
I
Me,N — C.
ΓΗΜθ
OH
Pyrromycin
(CXXX)
MeO-C
O
e -Isorhodomycinone
Me
ζ-Isorhodomycinone
NMe,
CONH,
O HO
Terramycin
(CXXXI)
aminosugars, peculiar to bacteria. (A dimethylamino group is also
present in the tetracyclines.) Thus pyrromycin (CXXX) is an e-pyrromycinone rhodosaminide, and rhodomycin A is a combination of two
molecules of /3-rhodomycinone with three of rhodosamine. The cinerubins both yield three sugars on hydrolysis; two from each have the