TAHARA AKIRA
,
SHIMAGAKI MASAYUKI
,
ITOH MASAYOSHI
,
HARIGAYA YOSHIHIRO
,
ONDA MASAYUKI
The steroidal D-rings (31 and 37), along with 32 and 38, were synthesized by the use of a part or whole of the carbon units of the isopropyl group of l-abietic acid (1), via oxidation of 18 or 20 with …
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