The lipid part of the moenomycins is completely isoprenoid and is construct
ed via the non-mevalonate pathway. The central C-10 part originates from a
precursor like geranyl or linalyl diphosphate and is formed by a route invo
lving ring formation between C-2 and C-6 of the monoterpene unit, two succe
ssive rearrangements to give a seven-membered ring intermediate and cleavag
e of the ring at the C-5 and C-11 bond (moenocinol numbering). (C) 2000 Els
evier Science Ltd. All rights reserved.